docs: Improve GitHub release template and contributor section

- Add a section for contributors with a thank you message
- Create a link to compare current and previous tags in the template

Author: johnnyhuy

.github/release-drafter.yml

@@ -28,4 +28,12 @@ version-resolver:
 template: |
   ## What's Changed
 
-  $CHANGES
+  $CHANGES
+
+  ## Contributors
+
+  Thanks to everyone who contributed to this release!
+
+  $CONTRIBUTORS
+
+  [:books: `Compare from $PREVIOUS_TAG`](https://github.com/$OWNER/$REPOSITORY/compare/$PREVIOUS_TAG...$CURRENT_TAG)