Align dependabot config to grouped updates

Reduce PR load. Will revert back to non-grouped updates if it becomes a problem.

Author: chadlwilson

.github/dependabot.yml

@@ -1,15 +1,18 @@
 version: 2
 updates:
-  - package-ecosystem: gradle
+  - package-ecosystem: github-actions
     directory: /
     schedule:
       interval: monthly
-    open-pull-requests-limit: 99
-  - package-ecosystem: github-actions
+    groups:
+      github-actions:
+        patterns:
+          - "*"
+  - package-ecosystem: gradle
     directory: /
     schedule:
       interval: monthly
     groups:
-      github-actions:
+      gradle-deps:
         patterns:
           - "*"