Add actions to dependabot config

Author: aeisenberg

.github/dependabot.yml

@@ -9,3 +9,12 @@ updates:
     ignore:
       - dependency-name: "*"
         update-types: ["version-update:semver-minor", "version-update:semver-patch"]
+  - package-ecosystem: "github-actions"
+    directory: ".github"
+    schedule:
+      interval: "daily"
+    labels:
+      - "Update dependencies"
+    ignore:
+      - dependency-name: "*"
+        update-types: ["version-update:semver-minor", "version-update:semver-patch"]