ci(dependabot): update dependabot PRs only if opened by dependabot (#36)

Author: dschach

.github/workflows/dependabot-approve-and-auto-merge.yml

@@ -6,6 +6,7 @@ permissions:
 jobs:
   pull-request-title-change:
     runs-on: ubuntu-latest
+    if: ${{ github.actor == 'dependabot[bot]' }}
     steps:
       # Checkout the source code
       - name: 'Checkout source code'
@@ -23,18 +24,13 @@ jobs:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           PR_URL: ${{github.event.pull_request.html_url}}
         run: |
-          echo $TITLE  
           title_pt2="${TITLE##*:}"
           title_pt1="${TITLE%%:*}"
           gh pr checkout "$PR_URL" # sets the upstream metadata for `gh pr status`
           packagename="${{ steps.dependabot-fetch.outputs.dependency-names }}"
-          #echo "packagename is $packagename"
-          #echo "$title_pt1"
-          #echo "$title_pt2"
           parensOpen="("
           parensClose="):"
           pr_title=$title_pt1$parensOpen$packagename$parensClose$title_pt2
-          echo "FINAL TITLE: $pr_title"
           gh pr edit "$PR_URL" --title "$pr_title"
 
   # Auto merge Dependabot PRs for: