Update dependabot.yml

.github/dependabot.yml

@@ -3,6 +3,10 @@
 
 version: 2
 updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: weekly
   # Enable version updates for npm
   - package-ecosystem: "npm"
     # Look for `package.json` and `lock` files in the `root` directory