Don't fail after-ci deploy-docs-preview if PR docs job failed

Author: DouweM

.github/workflows/after-ci.yml

@@ -65,6 +65,7 @@ jobs:
           commit: ${{ github.event.workflow_run.head_sha }}
           allow_forks: true
           workflow_conclusion: completed
+          if_no_artifact_found: warn
 
       - uses: cloudflare/wrangler-action@v3
         id: deploy