chore: Update pull request template

.github/pull_request_template.md

@@ -1,13 +1,6 @@
 *Thank you so much for your contribution to FluffyChat ❤️❤️❤️*
 
-Please make sure that your Pull Request meet the following **acceptance criteria**:
-
-- [ ] Code formatting and import sorting has been done with `dart format lib/ test/` and `dart run import_sorter:main --no-comments`
-- [ ] The commit message uses the format of [Conventional Commits](https://www.conventionalcommits.org)
-- [ ] The commit message describes what has been changed, why it has been changed and how it has been changed
-- [ ] Every new feature or change of the design/GUI is linked to an approved design proposal in an issue
-- [ ] Every new feature in the app or the build system has a strategy how this will be tested and maintained from now on for every release, e.g. a volunteer who takes over maintainership
-
+- [ ] I have read and understood the [contributing guidelines](https://github.com/krille-chan/fluffychat/blob/main/CONTRIBUTING.md). 
 
 ### Pull Request has been tested on: