fix: use cli for checkout

Author: bduranleau-nr

.github/workflows/issue-comment.yml

@@ -23,12 +23,6 @@ jobs:
     env:
       GH_TOKEN: ${{ secrets.token }}
     steps:
-      - name: Checkout newrelic-php-agent code
-        uses: actions/checkout@v4
-        with:
-          path: php-agent
-          repository: ${{ inputs.origin }}/newrelic-php-agent
-          ref: ${{ inputs.ref }}
       - name: respond to issue
         run: |
-          gh issue comment ${{ inputs.issue-number }} --body "${{ inputs.message }}"
+          gh issue -R ${{ github.repository }} comment ${{ inputs.issue-number }} --body "${{ inputs.message }}"