Merge pull request #10252 from AcKoucher/pr-template-regression-test

add regression-test checkbox to PR template

Author: maliberty

.github/PULL_REQUEST_TEMPLATE.md

@@ -16,6 +16,8 @@
 - [ ] I have verified that the local build succeeds (`./etc/Build.sh`).
 - [ ] I have run the relevant tests and they pass.
 - [ ] My code follows the repository's formatting guidelines.
+<!-- Delete next item if this PR is not a bug fix or new feature -->
+- [ ] I have included tests to prevent regressions.
 - [ ] **I have signed my commits (DCO).**
 
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