Bump peter-evans/create-pull-request from 6 to 7 in the all group (#788)

Bumps the all 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: all
...

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

.github/workflows/update-submodules.yml

@@ -35,7 +35,7 @@ jobs:
 
       - name: Open a pull request
         id: pr
-        uses: peter-evans/create-pull-request@v6
+        uses: peter-evans/create-pull-request@v7
         if: env.PREV_VIPERSERVER_REF != env.CUR_VIPERSERVER_REF
         with:
           # Use viper-admin's token to workaround a restriction of GitHub.