Group any Github action update into a single PR

When using a non-release version of cicd-workflows a lot of PRs are created otherwise. Which creates load on CI and triggers a bug in docs gh-pages deployment. See eclipse-score/docs-as-code#404

Author: lurtz

.github/dependabot.yml

@@ -20,9 +20,8 @@ updates:
       all-in-one:
         patterns:
           - "*"
-        update-types:
-          - "minor"
-          - "patch"
+          # update-types: not used by intention
+          # When using a non-release version of cicd-workflows a lot of PRs will be created by dependabot otherwise
 
   - package-ecosystem: cargo
     directory: /