we dont need prdetails going forward (#2309)

* use pull_request event rather than workflow_run

* use default for enable-pull-request-comment and enable-commit-comment

* we dont need prdetails going forward

.github/workflows/netlify-pr.yaml

@@ -28,17 +28,11 @@ jobs:
           step: start
           token: ${{ secrets.GITHUB_TOKEN }}
           env: Netlify
-          ref: ${{ github.ref || github.head_ref }}
+          ref: ${{ github.event.pull_request.head.sha || github.ref || github.head_ref }}
           desc: |
             Do you trust the author of this PR? Maybe this build will steal your keys or give you malware.
             Exercise caution. Use test accounts.
 
-      - id: prdetails
-        uses: matrix-org/pr-details-action@v1.3
-        with:
-          owner: ${{ github.event.pull_request.head.repo.owner.login }}
-          branch: ${{ github.event.pull_request.head.ref }}
-
       - name: 📥 Download artifact
         uses: actions/download-artifact@v4
         with:
@@ -58,7 +52,7 @@ jobs:
         with:
           publish-dir: webapp
           deploy-message: "Deploy from GitHub Actions"
-          alias: pr${{ steps.prdetails.outputs.pr_id }}
+          alias: pr${{ github.event.pull_request.number }}
         env:
           NETLIFY_AUTH_TOKEN: ${{ secrets.NETLIFY_AUTH_TOKEN }}
           NETLIFY_SITE_ID: ${{ secrets.NETLIFY_SITE_ID }}