doc: mention hurl test maintenance and improv mergeability wording #860

#860

Author: mmerdes

.github/PULL_REQUEST_TEMPLATE.md

@@ -10,10 +10,11 @@ Closes #
 -
 
 ### Checklist
-- [ ] I have updated my branch to `main` (e.g. through `git rebase main`)
+- [ ] I have ensured my branch is mergeable with `main` (e.g. through `git rebase main` if necessary)
 - [ ] My code follows the [style guide](https://github.com/GIScience/ohsome-quality-api/blob/main/CONTRIBUTING.md#style-guide) and was checked with [pre-commit](https://github.com/GIScience/ohsome-quality-api/blob/main/CONTRIBUTING.md#pre-commit) before committing
 - [ ] I have commented my code
 - [ ] I have added sufficient unit and integration [tests](https://github.com/GIScience/ohsome-quality-api/blob/main/docs/development_setup.md#tests)
+- [ ] I have added new Hurl regression tests and checked all existing [tests](../regression-tests/README.md)
 - [ ] I have updated the [CHANGELOG.md](https://github.com/GIScience/ohsome-quality-api/blob/main/CHANGELOG.md)
 
 Please check all finished tasks. If some tasks do not apply to your PR, please cross their text out (by using `~...~`) and remove their checkboxes.