Bump peter-evans/create-pull-request from 6 to 7

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-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/update-grammars.yml

@@ -131,7 +131,7 @@ jobs:
         git submodule update --remote --merge repos/${{ matrix.target }}
 
     - name: Create Pull Request
-      uses: peter-evans/create-pull-request@v6
+      uses: peter-evans/create-pull-request@v7
       with:
         title: 'chore: Bump ${{ matrix.target }} grammar'
         body: ''