gitea/.github/pull_request_template.md

Please check the following:

1. Make sure you are targeting the main branch, pull requests on release branches are only allowed for backports.
2. Make sure you have read contributing guidelines: https://github.com/go-gitea/gitea/blob/main/CONTRIBUTING.md .
3. Describe what your pull request does and which issue you're targeting (if any).
4. It is recommended to enable "Allow edits by maintainers", so maintainers can help more easily.
5. Your input here will be included in the commit message when this PR has been merged. If you don't want some content to be included, please separate them with a line like ---.
6. Delete all these tips before posting.