Include GitHub Actions in Dependabot config (#274)

Author: Mrtenz

.github/dependabot.yml

@@ -13,3 +13,15 @@ updates:
     target-branch: 'main'
     versioning-strategy: 'increase-if-necessary'
     open-pull-requests-limit: 10
+
+  - package-ecosystem: 'github-actions'
+    directory: '/'
+    schedule:
+      interval: 'daily'
+      time: '06:00'
+    allow:
+      - dependency-name: 'MetaMask/*'
+      - dependency-name: 'actions/*'
+    target-branch: 'main'
+    versioning-strategy: 'increase-if-necessary'
+    open-pull-requests-limit: 10