Add Vercel link to deploy job (#290)

* Fix for dev-portal is failing to build in UDR internal repo

Author: heatlikeheatwave

.github/workflows/build-pr-preview.yml

@@ -8,8 +8,8 @@ on:
       - main
       - develop
   # paths:
-    # Hello Security 👋, we are checking to make sure forked repo PR changed paths are only in content/** inside the job security-check.
-    # We are doing this so we can also reuse this workflow for internal PRs, as pull_request_target also triggers on internal PRs. (As does pull_request)
+  # Hello Security 👋, we are checking to make sure forked repo PR changed paths are only in content/** inside the job security-check.
+  # We are doing this so we can also reuse this workflow for internal PRs, as pull_request_target also triggers on internal PRs. (As does pull_request)
 
 concurrency:
   group: ${{ github.workflow }}-${{github.event_name}}-${{ github.event.pull_request.number || github.ref }}
@@ -124,6 +124,9 @@ jobs:
       - name: Install Vercel CLI
         run: npm i --global vercel@latest
 
+      - name: Link web-unified-docs Vercel Project # prevent creation/deployment to a web-unified-docs-internal Vercel project
+        run: vercel link --yes --project web-unified-docs --token=${{ secrets.VERCEL_TOKEN }}
+
       - name: Pull Vercel Environment Information
         run: vercel pull --yes --environment=preview --token=${{ secrets.VERCEL_TOKEN }}