dont do previews for dependabot (#579)

Author: pthmas

.github/workflows/preview.yml

@@ -14,6 +14,7 @@ concurrency: preview-${{ github.ref }}
 
 jobs:
   deploy-preview:
+    if: github.actor != 'dependabot[bot]'
     runs-on: ubuntu-latest
     permissions: write-all
     steps: