Updated k8s guides (#7411)

### Describe Your Changes

- updated dependencies versions 
- removed Helm v2 from docs
- fixed VMAgent configuration

### Checklist

The following checks are **mandatory**:

- [ ] My change adheres [VictoriaMetrics contributing
guidelines](https://docs.victoriametrics.com/contributing/).

docs/guides/examples/guide-vmcluster-vmagent-values.yaml

@@ -1,5 +1,5 @@
-remoteWriteUrls:
-   - http://vmcluster-victoria-metrics-cluster-vminsert.default.svc.cluster.local:8480/insert/0/prometheus/
+remoteWrite:
+  - url: http://vmcluster-victoria-metrics-cluster-vminsert.default.svc.cluster.local:8480/insert/0/prometheus/
 
 config:
   global:
@@ -219,4 +219,4 @@ config:
           target_label: kubernetes_namespace
         - source_labels: [__meta_kubernetes_pod_name]
           action: replace
-          target_label: kubernetes_pod_name
+          target_label: kubernetes_pod_name

docs/guides/k8s-ha-monitoring-via-vm-cluster/README.md

@@ -144,8 +144,8 @@ helm install vmagent vm/victoria-metrics-agent -f https://docs.victoriametrics.c
 Here is full file content `guide-vmcluster-vmagent-values.yaml`
 
 ```yaml
-remoteWriteUrls:
-   - http://vmcluster-victoria-metrics-cluster-vminsert.default.svc.cluster.local:8480/insert/0/prometheus/
+remoteWrite:
+   - url: http://vmcluster-victoria-metrics-cluster-vminsert.default.svc.cluster.local:8480/insert/0/prometheus/
    
 scrape_configs:
     - job_name: vmagent
@@ -222,8 +222,7 @@ scrape_configs:
           target_label: systemd_service_name
           replacement: '${1}'
 ```
-
-* `remoteWriteUrls: - http://vmcluster-victoria-metrics-cluster-vminsert.default.svc.cluster.local:8480/insert/0/prometheus/` configures `vmagent` to write scraped metrics to the `vmselect service`.
+* By updating `remoteWrite` we configuring [vmagent](https://docs.victoriametrics.com/vmagent/) to write scraped metrics into the `vminsert` service.
 * The `metric_relabel_configs` section allows you to process Kubernetes metrics for the Grafana dashboard.
 
 

docs/guides/k8s-monitoring-via-vm-cluster/README.md

@@ -8,17 +8,15 @@
 **Precondition**
 
 We will use:
-* [Kubernetes cluster 1.19.9-gke.1900](https://cloud.google.com/kubernetes-engine)
-> We use GKE cluster from [GCP](https://cloud.google.com/) but this guide also applies on any Kubernetes cluster. For example [Amazon EKS](https://aws.amazon.com/ru/eks/).
-* [Helm 3 ](https://helm.sh/docs/intro/install)
-* [kubectl 1.21](https://kubernetes.io/docs/tasks/tools/install-kubectl)
+* [Kubernetes cluster 1.31.1-gke.1678000](https://cloud.google.com/kubernetes-engine)
+> We use GKE cluster from [GCP](https://cloud.google.com/) but this guide is also applied on any Kubernetes cluster. For example [Amazon EKS](https://aws.amazon.com/ru/eks/).
+* [Helm 3.14+](https://helm.sh/docs/intro/install)
+* [kubectl 1.31](https://kubernetes.io/docs/tasks/tools/install-kubectl)
 
 ![VMCluster on K8s](scheme.webp)
 
 ## 1. VictoriaMetrics Helm repository
 
-> For this guide we will use Helm 3 but if you already use Helm 2 please see this [https://github.com/VictoriaMetrics/helm-charts#for-helm-v2](https://github.com/VictoriaMetrics/helm-charts#for-helm-v2)
-
 You need to add the VictoriaMetrics Helm repository to install VictoriaMetrics components. We’re going to use [VictoriaMetrics Cluster](https://docs.victoriametrics.com/cluster-victoriametrics/). You can do this by running the following command:
 
 ```shell
@@ -166,8 +164,8 @@ helm install vmagent vm/victoria-metrics-agent -f https://docs.victoriametrics.c
 Here is full file content `guide-vmcluster-vmagent-values.yaml`
 
 ```yaml
-remoteWriteUrls:
-   - http://vmcluster-victoria-metrics-cluster-vminsert.default.svc.cluster.local:8480/insert/0/prometheus/
+remoteWrite:
+   - url: http://vmcluster-victoria-metrics-cluster-vminsert.default.svc.cluster.local:8480/insert/0/prometheus/
 
 config:
   global:
@@ -390,7 +388,7 @@ config:
           target_label: kubernetes_pod_name
 ```
 
-* By adding `remoteWriteUrls: - http://vmcluster-victoria-metrics-cluster-vminsert.default.svc.cluster.local:8480/insert/0/prometheus/` we configuring [vmagent](https://docs.victoriametrics.com/vmagent/) to write scraped metrics into the `vmselect service`.
+* By updating `remoteWrite` we configuring [vmagent](https://docs.victoriametrics.com/vmagent/) to write scraped metrics into the `vminsert` service.
 * The second part of this yaml file is needed to add the `metric_relabel_configs` section that helps us to show Kubernetes metrics on the Grafana dashboard.
 
 

docs/guides/k8s-monitoring-via-vm-single/README.md

@@ -8,17 +8,15 @@
 **Precondition**
 
 We will use:
-* [Kubernetes cluster 1.19.9-gke.1900](https://cloud.google.com/kubernetes-engine)
+* [Kubernetes cluster 1.31.1-gke.1678000](https://cloud.google.com/kubernetes-engine)
 > We use GKE cluster from [GCP](https://cloud.google.com/) but this guide is also applied on any Kubernetes cluster. For example [Amazon EKS](https://aws.amazon.com/ru/eks/).
-* [Helm 3 ](https://helm.sh/docs/intro/install)
-* [kubectl 1.21](https://kubernetes.io/docs/tasks/tools/install-kubectl)
+* [Helm 3.14+](https://helm.sh/docs/intro/install)
+* [kubectl 1.31](https://kubernetes.io/docs/tasks/tools/install-kubectl)
 
 ![VictoriaMetrics Single on Kubernetes cluster](k8s-scheme.webp)
 
 ## 1. VictoriaMetrics Helm repository
 
-> For this guide we will use Helm 3 but if you already use Helm 2 please see this [https://github.com/VictoriaMetrics/helm-charts#for-helm-v2](https://github.com/VictoriaMetrics/helm-charts#for-helm-v2)
-
 You need to add the VictoriaMetrics Helm repository to install VictoriaMetrics components. We’re going to use [VictoriaMetrics Single](https://docs.victoriametrics.com/single-server-victoriametrics/). You can do this by running the following command: