Update issue templates

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+Thanks for helping us to improve k3s! We welcome all feature requests. At this stage, we are also looking for help in testing/QAing issues. Once we've addressed your feature request, we'll ping you in the comments to see if you can verify the change. We'll give you details on what version can be used to test the change. Additionally, if you are interested in testing other fixes or feature requests that you ***didn't*** report, look for the issues with the status/to-test label. You can pick any of these up for verification. ***You can delete this message portion of the bug report.***
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.