ci: use current vercel version (#9926)

Author: radoering

.github/workflows/docs.yaml

@@ -68,6 +68,7 @@ jobs:
 
       - uses: amondnet/vercel-action@16e87c0a08142b0d0d33b76aeaf20823c381b9b9 # v25.2.0
         with:
+          vercel-version: 39.2.2
           vercel-token: ${{ secrets.VERCEL_TOKEN }}
           github-token: ${{ secrets.GITHUB_TOKEN }}
           vercel-org-id: ${{ secrets.VERCEL_ORG_ID }}