build(deps): bump actions/github-script from 5 to 6

Bumps [actions/github-script](https://github.com/actions/github-script) from 5 to 6.
- [Release notes](https://github.com/actions/github-script/releases)
- [Commits](https://github.com/actions/github-script/compare/v5...v6)

---
updated-dependencies:
- dependency-name: actions/github-script
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/submodule-update.yml

@@ -49,7 +49,7 @@ jobs:
 
       - name: Create pull request against target branch
         if: steps.check_for_changes.outputs.changes == 'true'
-        uses: actions/github-script@v5
+        uses: actions/github-script@v6
         with:
           github-token: ${{ inputs.github_token }}
           script: |
@@ -64,7 +64,7 @@ jobs:
 
       - name: Add labels
         if: steps.check_for_changes.outputs.changes == 'true'
-        uses: actions/github-script@v5
+        uses: actions/github-script@v6
         with:
           github-token: ${{ inputs.github_token }}
           script: |