build(deps): bump megalinter/megalinter from 5 to 6

Bumps [megalinter/megalinter](https://github.com/megalinter/megalinter) from 5 to 6.
- [Release notes](https://github.com/megalinter/megalinter/releases)
- [Changelog](https://github.com/oxsecurity/megalinter/blob/main/CHANGELOG.md)
- [Commits](oxsecurity/megalinter@v5...v6)

---
updated-dependencies:
- dependency-name: megalinter/megalinter
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/megalinter.yaml

@@ -18,7 +18,7 @@ jobs:
           fetch-depth: 0
       - name: MegaLinter
         id: ml
-        uses: megalinter/megalinter/flavors/terraform@v5
+        uses: megalinter/megalinter/flavors/terraform@v6
         env:
           VALIDATE_ALL_CODEBASE: true
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}