chore: Upgrade dependabot to upgrade GitHub actions (#2618)

Author: LeonLuttenberger

.github/dependabot.yml

@@ -11,3 +11,15 @@ updates:
           dependency-type: "production"
         development-dependencies:
           dependency-type: "development"
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+    schedule:
+      interval: "weekly"
+      time: "09:00"
+      timezone: "Europe/London"
+    groups:
+      github-actions:
+        patterns:
+          - "*"