add dependabot for actions

Author: SMillerDev

.github/dependabot.yml

@@ -5,11 +5,8 @@ updates:
   schedule:
     interval: daily
   open-pull-requests-limit: 10
-  ignore:
-  - dependency-name: phpstan/phpstan
-    versions:
-    - 0.12.70
-    - 0.12.77
-    - 0.12.78
-    - 0.12.79
-    - 0.12.83
+- package-ecosystem: "github-actions"
+  directory: "/"
+  schedule:
+    # Check for updates to GitHub Actions every week
+    interval: "weekly"