Merge pull request #5611 from consuldemocracy/dependabot_github

Use dependabot to update github actions dependencies

.github/dependabot.yml

@@ -5,8 +5,15 @@ updates:
   schedule:
     interval: monthly
   open-pull-requests-limit: 50
+  labels:
+    - "dependencies"
 - package-ecosystem: npm
   directory: "/"
   schedule:
     interval: monthly
   open-pull-requests-limit: 50
+- package-ecosystem: "github-actions"
+  directory: "/"
+  schedule:
+    interval: monthly
+  open-pull-requests-limit: 50