build(deps): bump fizyk/actions-reuse/.github/workflows/shared-automerge.yml

Bumps [fizyk/actions-reuse/.github/workflows/shared-automerge.yml](https://github.com/fizyk/actions-reuse) from 4.1.1 to 4.2.1.
- [Changelog](https://github.com/fizyk/actions-reuse/blob/main/Changelog.rst)
- [Commits](fizyk/actions-reuse@v4.1.1...v4.2.1)

---
updated-dependencies:
- dependency-name: fizyk/actions-reuse/.github/workflows/shared-automerge.yml
  dependency-version: 4.2.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/automerge.yml

@@ -13,7 +13,7 @@ on:
 
 jobs:
   automerge:
-    uses: fizyk/actions-reuse/.github/workflows/shared-automerge.yml@v4.1.1
+    uses: fizyk/actions-reuse/.github/workflows/shared-automerge.yml@v4.2.1
     secrets:
       app_id: ${{ secrets.MERGE_APP_ID }}
       private_key: ${{ secrets.MERGE_APP_PRIVATE_KEY }}