Merge pull request adafruit#10165 from dhalbert/9.2.x-pr-template

Create a pull request template to add a few reminders

Author: dhalbert

.github/pull_request_template.md

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+Thanks for submitting a pull request to CircuitPython! Remove these instructions before submitting.
+
+ See https://learn.adafruit.com/contribute-to-circuitpython-with-git-and-github for detailed instructions.
+
+- Consider whether to submit this PR against `main` or against (if it exists) the branch for the current stable release or an upcoming minor release. The branch will be named `i.j.x`, for example, `9.2.x`. Bug fixes and minor enhancements can be submitted against the stable release branch, and will be merged to `main` regularly.
+- Create your own fork of `circuitpython` and create a branch for your changes.
+- Use `pre-commit` to check your commits before submitting. See https://learn.adafruit.com/contribute-to-circuitpython-with-git-and-github/check-your-code.
+- Test your changes and tell us how you tested.
+
+---