Update issue templates

.github/ISSUE_TEMPLATE/performance-issue.md

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+---
+name: Performance Issue
+about: Report a behavioural problem with SteamVR
+title: "[BUG]"
+labels: bug
+assignees: ''
+
+---
+
+**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**
+If applicable, add screenshots to help explain your problem.
+
+**System Information (please complete the following information):**
+- Distribution: [Arch/Manjaro/Ubuntu/etc.]
+- SteamVR version?: [E.g. 1.7.2]
+- Steam client version: [build number or date] 
+- Opted into Steam client beta?: [Yes/No]
+- Graphics driver version:  [run `nvidia-settings` or `vulkaninfo | grep driverInfo`:
+- Gist for SteamVR System Information: [See [instructions](https://github.com/ValveSoftware/SteamVR-for-Linux/blob/master/CapturingSystemReport.md)]
+
+**Additional context**
+Add any other context about the problem here.
+
+**Note:** Commenters who are also experiencing this issue are encouraged to include the "System Information" section in their replies.