Use same release.yml file as in the flutter repo

This moves the dependencies to a separate group, since it's a bit less important

.github/release.yml

@@ -1,4 +1,12 @@
+# https://docs.github.com/en/repositories/releasing-projects-on-github/automatically-generated-release-notes
 changelog:
-  exclude:
-    authors:
-      - dependabot
+  categories:
+    - title: Features
+      labels:
+        - '*'
+      exclude:
+        labels:
+          - dependencies
+    - title: Dependencies
+      labels:
+        - dependencies