Bump peter-evans/create-pull-request from 6 to 7 (#415)

Bumps [peter-evans/create-pull-request](https://github.com/peter-evans/create-pull-request) from 6 to 7.
- [Release notes](https://github.com/peter-evans/create-pull-request/releases)
- [Commits](peter-evans/create-pull-request@v6...v7)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/template-schema-updater.yaml

@@ -26,7 +26,7 @@ jobs:
           mv specs/* ../server/schema/
           cd ..
           rm -rf aws-cloudformation-template-schema
-      - uses: peter-evans/create-pull-request@v6
+      - uses: peter-evans/create-pull-request@v7
         with:
           commit-message: |
             CloudFormation Template Schema upgrade