Update PR template (#28001)

* Update PR template

* review

.github/PULL_REQUEST_TEMPLATE.md

-###### Before submitting the PR, please make sure you do the following
+> **Warning**
+>
+> If that is your first contribution to Metabase, please sign the [Contributor License Agreement](https://docs.google.com/a/metabase.com/forms/d/1oV38o7b9ONFSwuzwmERRMi9SYrhYeOrkbmNaq9pOJ_E/viewform) (unless it's a tiny documentation change). Also, if you're attempting to fix a translation issue, please submit your changes to our [POEditor project](https://poeditor.com/join/project/ynjQmwSsGh) instead of opening a PR.
 
-- [ ] If you're attempting to fix a translation issue, please submit your changes to our [POEditor project](https://poeditor.com/join/project/ynjQmwSsGh) instead of opening a PR.
+Closes https://github.com/metabase/metabase/issues/[issue_number]
 
-### Tests
+### Description
 
-- [ ] Run the frontend and Cypress end-to-end tests with `yarn lint && yarn test`)
-- [ ] If there are changes to the backend codebase, run the backend tests with `clojure -X:dev:test`
-- [ ] Sign the [Contributor License Agreement](https://docs.google.com/a/metabase.com/forms/d/1oV38o7b9ONFSwuzwmERRMi9SYrhYeOrkbmNaq9pOJ_E/viewform)
-      (unless it's a tiny documentation change).
+Describe the overall approach and the problem being solved.
+
+### How to verify
+
+Describe the steps to verify that the changes are working as expected.
+
+1. New question -> Sample Dataset -> ...
+2. ...
+
+### Demo
+
+_Upload a demo video or before/after screenshots if sensible or remove the section_
+
+### Checklist
+
+- [ ] Tests have been added/updated to cover changes in this PR