fix(workflow-auto-merge-release-hotfix-into-develop): add missing step checkout repository

Author: ansidev

.github/workflows/auto_merge_release_hotfix_into_develop.yaml

@@ -24,6 +24,14 @@ jobs:
         run: |
           echo "GH_TOKEN=${{ secrets.GH_TOKEN }}" >> $GITHUB_ENV
 
+      - name: Checkout repository
+        uses: actions/checkout@v3
+        with:
+          ref: ${{ github.head_ref }}
+          token: ${{ env.GH_TOKEN }}
+          # needed by "gh pr create"
+          fetch-depth: 0
+
       - name: Merge PR
         env:
           PR_NUMBER: ${{ github.event.number }}