Update pull_request_template.md

.github/pull_request_template.md

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+<!--
+Thank you for submitting new code to Firefly III, or any of the related projects. Please read the following rules carefully.
+
+- Please do not submit solutions for problems that are not already reported in an issue.
+- Unfortunately, Firefly III can't be your learning experience. If you're new to all of this, please open an issue first.
+- Please do not open PRs to "discuss" possible solutions or to "get feedback" on your code. I simply don't have time for that.
+- Pull requests for the MAIN branch will be closed.
+- DO NOT include translated strings in your PR.
+- PRs (or parts thereof) that only fix issues inside code comments will not be accepted.
+
+If it feels necessary to open an issue first, please do so, before you open a PR.
+
+See also: https://docs.firefly-iii.org/explanation/support/#contributing-code
+
+-->
+
 Fixes issue # (if relevant)
 
 Changes in this pull request: