Add workflow for pull request draft builds (#174)

Author: mlr

.github/workflows/dispatch-deploy-draft.yml

@@ -1,11 +1,6 @@
-name: Dispatch Deploy Draft
+name: Deploy Draft
 
 on:
-  push:
-    branches:
-      - 'main'
-      - 'stage'
-      # Add additional content source branches here
   pull_request:
     branches:
       - '*'
@@ -20,7 +15,7 @@ jobs:
         run: |
           if [ "${{ github.event_name }}" == "pull_request" ]; then
             # If this workflow is kicked off by a pull request, build
-            # a draft using the pull resource base branch and PR branch.
+            # a draft using the pull request base branch and PR branch.
             build_branch="${{ github.base_ref }}"
             draft_branch="${{ github.event.pull_request.head.ref }}"
           else
@@ -39,12 +34,12 @@ jobs:
           echo "draft_branch=$draft_branch" >> $GITHUB_OUTPUT
         id: branches
 
-      - name: Dispatch Deploy Draft
+      - name: Deploy Draft
         uses: convictional/[email protected]
         with:
           owner: riptano
           repo: datastax-docs-site
           github_token: ${{ secrets.DISPATCH_GITHUB_TOKEN }}
-          github_user: mlr
+          github_user: ${{ secrets.DISPATCH_GITHUB_USER }}
           workflow_file_name: deploy-draft.yml
           client_payload: '{ "build_repository": "${{ github.event.repository.full_name }}", "build_branch": "${{ steps.branches.outputs.build_branch }}", "draft_branch": "${{ steps.branches.outputs.draft_branch }}", "pull_request_number": "${{ github.event.pull_request.number }}" }'