Merge pull request #23810 from storybookjs/vy/reword-pr-template

Docs: Reword PR template

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,12 +1,33 @@
 Closes #
 
-<!-- Thank you for contributing to Storybook! If your PR is related to an issue, provide the number(s) above; if it resolves multiple issues, be sure to break them up (e.g. "closes #1000, closes #1001"). -->
+<!-- If your PR is related to an issue, provide the number(s) above; if it resolves multiple issues, be sure to break them up (e.g. "closes #1000, closes #1001"). -->
+
+<!--
+
+Thank you for contributing to Storybook! Please submit all PRs to the `next` branch unless they are specific to the current release. Storybook maintainers cherry-pick bug and documentation fixes into the `main` branch as part of the release process, so you shouldn't need to worry about this. For additional guidance: https://storybook.js.org/docs/react/contribute/how-to-contribute
+
+-->
+
 
 ## What I did
 
 <!-- Briefly describe what your PR does -->
 
-## How to test
+## Checklist for Contributors
+
+### Testing
+
+<!-- Please check (put an "x" inside the "[ ]") the applicable items below to communicate how to test your changes -->
+
+#### The changes in this PR are covered in the following automated tests:
+- [ ] stories
+- [ ] unit tests
+- [ ] integration tests
+- [ ] end-to-end tests
+
+#### Manual testing
+
+_This section is mandatory for all contributions. If you believe no manual test is necessary, please state so explicitly. Thanks!_
 
 <!-- Please include the steps to test your changes here. For example:
 
@@ -16,27 +37,32 @@ Closes #
 
 -->
 
-## Checklist
+### Documentation
 
-<!-- Please check (put an "x" inside the "[ ]") the applicable items below to make sure your PR is ready to be reviewed. -->
+<!-- Please check (put an "x" inside the "[ ]") the applicable items below to indicate which documentation has been updated. -->
 
-- [ ] Make sure your changes are tested (stories and/or unit, integration, or end-to-end tests)
-- [ ] Make sure to add/update documentation regarding your changes
+- [ ] Add or update documentation reflecting your changes
 - [ ] If you are deprecating/removing a feature, make sure to update
       [MIGRATION.MD](https://github.com/storybookjs/storybook/blob/next/MIGRATION.md)
 
-#### Maintainers
+## Checklist for Maintainers
 
 - [ ] When this PR is ready for testing, make sure to add `ci:normal`, `ci:merged` or `ci:daily` GH label to it to run a specific set of sandboxes. The particular set of sandboxes can be found in `code/lib/cli/src/sandbox-templates.ts`
-- [ ] Make sure this PR contains **one** of the labels below.
-
-`["cleanup", "BREAKING CHANGE", "feature request", "bug", "build", "documentation", "maintenance", "dependencies", "other"]`
-
-<!--
-
-Everybody: Please submit all PRs to the `next` branch unless they are specific to the current release. Storybook maintainers cherry-pick bug and documentation fixes into the `main` branch as part of the release process, so you shouldn't need to worry about this. For additional guidance: https://storybook.js.org/docs/react/contribute/how-to-contribute
-
--->
+- [ ] Make sure this PR contains **one** of the labels below:
+   <details>
+     <summary>Available labels</summary>
+
+     - `bug`: Internal changes that fixes incorrect behavior.
+     - `maintenance`: User-facing maintenance tasks.
+     - `dependencies`: Upgrading (sometimes downgrading) dependencies.
+     - `build`: Internal-facing build tooling & test updates. Will not show up in release changelog.
+     - `cleanup`: Minor cleanup style change. Will not show up in release changelog.
+     - `documentation`: Documentation **only** changes. Will not show up in release changelog.
+     - `feature request`: Introducing a new feature.
+     - `BREAKING CHANGE`: Changes that break compatibility in some way with current major version.
+     - `other`: Changes that don't fit in the above categories.
+
+   </details>
 
 ### 🦋 Canary release