[#12704] Release V8.30.0 (#12705)

* Update some outdated docs

* Add new contributors + update old usernames

* Update committers and team members list

docs/static-analysis.md

@@ -20,7 +20,8 @@ The version number of all the tool stacks are declared in `build.gradle` or `pac
 | [SpotBugs](https://spotbugs.github.io/) | [`teammates-spotbugs.xml`](https://github.com/TEAMMATES/teammates/blob/master/static-analysis/teammates-spotbugs.xml) |
 | [ArchUnit](https://github.com/TNG/ArchUnit) | - |
 | [ESLint](https://eslint.org/) | [`teammates-eslint.yml`](https://github.com/TEAMMATES/teammates/blob/master/static-analysis/teammates-eslint.yml) |
-| [stylelint](http://stylelint.io) | [`teammates-stylelint.yml`](https://github.com/TEAMMATES/teammates/blob/master/static-analysis/teammates-stylelint.yml) |
+| [stylelint](https://stylelint.io/) | [`teammates-stylelint.yml`](https://github.com/TEAMMATES/teammates/blob/master/static-analysis/teammates-stylelint.yml) |
+| [prettier](https://prettier.io/) | - |
 | [lintspaces](https://github.com/evanshortiss/lintspaces-cli) | - |
 
 ## Suppressing rules
@@ -47,7 +48,8 @@ General rule of thumb when suppressing rules:
 | SpotBugs | `./gradlew spotbugsMain`, `./gradlew spotbugsTest` |
 | ArchUnit | `./gradlew architectureTest` |
 | ESLint | `npm run lint:ts` |
-| stylelint | `npm run lint:css` |
+| stylelint | `npm run lint:css:syntax` |
+| prettier | `npm run lint:css:styles` |
 | lintspaces | `npm run lint:spaces` |
 
 To run all static analysis tasks in one sitting, run the following two commands:

docs/troubleshooting-guide.md

@@ -76,4 +76,4 @@ Add `-Djava.io.tmpdir=/path/to/teammates/tmp` for the tests' run configurations.
 
 ## Submitting help request
 
-If none of the items in this guide helps with the problem you face, you can [post in the issue tracker](https://github.com/TEAMMATES/teammates/issues/new?template=help-request.md) to request for help. Remember to supply as much relevant information as possible when requesting for help.
+If none of the items in this guide helps with the problem you face, you can [post in the discussion forum](https://github.com/TEAMMATES/teammates/discussions/new?category=help-requests) to request for help. Remember to supply as much relevant information as possible when requesting for help.