Bump github/super-linter from 4 to 6

Bumps [github/super-linter](https://github.com/github/super-linter) from 4 to 6.
- [Release notes](https://github.com/github/super-linter/releases)
- [Changelog](https://github.com/github/super-linter/blob/main/CHANGELOG.md)
- [Commits](github/super-linter@v4...v6)

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

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

.github/workflows/code-review.yml

@@ -19,7 +19,7 @@ jobs:
           fetch-depth: 0
 
       - name: Run github/super-linter
-        uses: github/super-linter@v4
+        uses: github/super-linter@v6
         env:
           # Lint all code - disabled in as part of #262
           VALIDATE_ALL_CODEBASE: false