Build/Test Tools: Skip pull request comments for Dependabot.

Currently, Dependabot is configured to open pull requests when updates to 3rd-party GitHub Actions become available.

It does a great job at this. Thank you very much, 🤖 Mr. Dependabot Roboto.

Some of the automated comments for pull requests are not relevant to PRs opened by Dependabot. Despite how good of a robot it is, Dependabot will never open a Trac ticket, so it's pointless to ask for one.

Also, since it’s currently only configured to watch GitHub Actions for updates, there will never be a need to test Dependabot PRs in Playground. If instructed to monitor npm dependencies in the future, this comment can be added back as those packages can directly affect the built software that is distributed.

Props johnbillion.
See #62221.

git-svn-id: https://develop.svn.wordpress.org/trunk@59370 602fd350-edb4-49c9-b593-d223f7449a82

.github/workflows/pull-request-comments.yml

@@ -123,6 +123,7 @@ jobs:
 
       - name: Leave a comment about testing with Playground
         uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
+        if: ${{ github.actor != 'dependabot' }}
         with:
           script: |
             const fs = require( 'fs' );
@@ -171,7 +172,7 @@ jobs:
     permissions:
       issues: write
       pull-requests: write
-    if: ${{ github.repository == 'WordPress/wordpress-develop' && github.event_name == 'pull_request_target' && ! github.event.pull_request.draft && github.event.pull_request.state == 'open' }}
+    if: ${{ github.repository == 'WordPress/wordpress-develop' && github.event_name == 'pull_request_target' && ! github.event.pull_request.draft && github.event.pull_request.state == 'open' && github.actor != 'dependabot' }}
     steps:
       - name: Check for Trac ticket and manage comment
         uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1