align dependabot config with files app

Signed-off-by: Andy Scherzinger <info@andy-scherzinger.de>

.github/dependabot.yml

@@ -1,5 +1,9 @@
 version: 2
 updates:
+    -   package-ecosystem: "github-actions"
+            directory: "/" # Location of package manifests
+            schedule:
+                interval: "weekly"
     -   package-ecosystem: gradle
             directory: "/"
             schedule:
@@ -9,3 +13,4 @@ updates:
             open-pull-requests-limit: 10
             labels:
                 - 3. to review
+                - dependencies