Bump peter-evans/create-pull-request from 4 to 6

Bumps [peter-evans/create-pull-request](https://github.com/peter-evans/create-pull-request) from 4 to 6.
- [Release notes](https://github.com/peter-evans/create-pull-request/releases)
- [Commits](peter-evans/create-pull-request@v4...v6)

---
updated-dependencies:
- dependency-name: peter-evans/create-pull-request
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/template-sync.yml

@@ -30,7 +30,7 @@ jobs:
           private_key: ${{ secrets.SYNC_APP_PRIVATE_KEY }}
 
       - name: Submit PR
-        uses: peter-evans/create-pull-request@v4
+        uses: peter-evans/create-pull-request@v6
         with:
           commit-message: Updating collection with changes to prefect-collection-template
           token: ${{ steps.generate-token.outputs.token }}