Update dependabot and triggers (#51)

Author: BernieWhite

.github/dependabot.yml

@@ -17,16 +17,6 @@ updates:
     reviewers:
       - azure/psrule-rules-azure
 
-  # Maintain dependencies for GitHub Actions
-  - package-ecosystem: github-actions
-    directory: '/'
-    schedule:
-      interval: daily
-    labels:
-      - dependencies
-    reviewers:
-      - azure/psrule-rules-azure
-
   # Maintain dependencies for Dev Containers
   - package-ecosystem: devcontainers
     directory: '/'

.github/workflows/ci.yaml

@@ -16,6 +16,8 @@ name: CI
 
 # Run for main or PRs against main
 on:
+  push:
+    branches: [main, 'dependencies/*']
   pull_request:
     branches:
       - main