chore: update readme to show conventional commits requirements

Signed-off-by: John Molakvoæ <skjnldsv@users.noreply.github.com>

.github/CONTRIBUTING.md

@@ -29,6 +29,13 @@ Thanks for wanting to contribute source code to Nextcloud. That's great!
 
 Please read the [Developer Manuals][devmanual] to learn how to create your first application or how to test the Nextcloud code with PHPUnit.
 
+### Conventional Commits
+
+Please use [Conventional Commits](https://www.conventionalcommits.org) for your commit messages. This helps maintain clarity and consistency across the project, making it easier to understand changes and automate versioning.
+```
+feat(files_sharing): allow sharing with contacts
+``` 
+
 ### Tests
 
 In order to constantly increase the quality of our software we can no longer accept pull request which submit un-tested code.
@@ -44,9 +51,9 @@ their contribution under the project's license.
 Please read [contribute/developer-certificate-of-origin][dcofile].
 If you can certify it, then just add a line to every git commit message:
 
-````
-  Signed-off-by: Random J Developer <random@developer.example.org>
-````
+```
+Signed-off-by: Random J Developer <random@developer.example.org>
+```
 
 Use your real name (sorry, no pseudonyms or anonymous contributions).
 If you set your `user.name` and `user.email` git configs, you can sign your