Update dev-hato/actions-diff-pr-management action to v1.2.0 (#1580)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/update-package.yml

@@ -29,7 +29,7 @@ jobs:
           cache: npm
       - if: github.event_name != 'pull_request' || github.event.action != 'closed'
         run: npm install
-      - uses: dev-hato/actions-diff-pr-management@v1.1.13
+      - uses: dev-hato/actions-diff-pr-management@v1.2.0
         with:
           github-token: ${{secrets.GITHUB_TOKEN}}
           branch-name-prefix: fix-package