Edit github workflow for documentation previews (#2612) (#2615)

(cherry picked from commit 37d19c5)

Co-authored-by: Lisa Cawley <lcawley@elastic.co>

.github/workflows/docs-preview-links.yml

@@ -1,26 +1,20 @@
-name: Docs Preview Links
+name: docs-preview
 
 on:
   pull_request_target:
     types: [opened]
     paths:
       - '**.asciidoc'
+permissions:
+  pull-requests: write
 
 jobs:
-  doc-preview:
+  doc-preview-pr:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/github-script@v6
-        name: Add doc preview links
+      - uses: elastic/docs/.github/actions/docs-preview@master
         with:
-          script: |
-            const pr = context.payload.pull_request;
-            const comment = `Documentation preview:
-              - ✨ [Changed pages](https://${context.repo.repo}_${pr.number}.docs-preview.app.elstc.co/diff)`;
-            
-            github.rest.issues.createComment({
-              issue_number: context.issue.number,
-              owner: context.repo.owner,
-              repo: context.repo.repo,
-              body: comment,
-            });
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          repo: ${{ github.event.repository.name }}
+          preview-path: 'guide/index.html'
+          pr: ${{ github.event.pull_request.number }}