Update issue templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots / Logfiles**
+If applicable, add screenshots / logfiles to help explain your problem.
+
+**Hard-/Software involved:**
+ - Hardware: [e.g. Dell M620]
+ - Host XCP-ng Version: [e.g. 7.4.1]
+ - Client XCP-ng Center Version: [e.g. 7.4.2-RC2]
+ - Desktop OS: [e.g. Windows 10 1803]
+
+**Additional context**
+Add any other context about the problem here.