Add dependabot for github actions

Author: PicoCentauri

.github/dependabot.yml

@@ -0,0 +1,11 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: monthly
+    open-pull-requests-limit: 1
+    groups:
+      action-dependencies:
+        patterns:
+          - "*" # A wildcard to create one PR for all dependencies in the ecosystem