chore(deps): Bump peter-evans/create-pull-request

Bumps the gh-actions group with 1 update: [peter-evans/create-pull-request](https://github.com/peter-evans/create-pull-request).


Updates `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
  dependency-group: gh-actions
...

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

.github/workflows/update-flake-lock.yml

@@ -56,7 +56,7 @@ jobs:
 
       - name: Create Pull Request
         if: ${{ hashFiles('commit_msg_body.txt') != '' }}
-        uses: peter-evans/create-pull-request@v6
+        uses: peter-evans/create-pull-request@v7
         with:
           token: ${{ steps.generate-token.outputs.token }}
           title: 'Update Nix Flake lockfile'