Replace manual npm update

Author: marianards

.github/workflows/monthly_npm_dependency_update.yml

@@ -12,9 +12,6 @@ jobs:
       contents: write
       pull-requests: write
     steps:
-      - name: Checkout
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd #v6
-
       - name: Run Renovate
         uses: renovatebot/github-action@83ec54fee49ab67d9cd201084c1ff325b4b462e4 #v46.1.10
         with: