build(deps): bump contentful/github-auto-merge from 1 to 2

Bumps [contentful/github-auto-merge](https://github.com/contentful/github-auto-merge) from 1 to 2.
- [Commits](contentful/github-auto-merge@v1...v2)

---
updated-dependencies:
- dependency-name: contentful/github-auto-merge
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/auto-merge.yml

@@ -10,6 +10,6 @@ jobs:
     runs-on: ubuntu-latest
     if: github.actor == 'dependabot[bot]'
     steps:
-      - uses: contentful/github-auto-merge@v1
+      - uses: contentful/github-auto-merge@v2
         with:
           VAULT_URL: ${{ secrets.VAULT_URL }}