Bump streetsidesoftware/cspell-action from 6.6.0 to 6.7.0 (#524)

Bumps [streetsidesoftware/cspell-action](https://github.com/streetsidesoftware/cspell-action) from 6.6.0 to 6.7.0.
- [Release notes](https://github.com/streetsidesoftware/cspell-action/releases)
- [Changelog](https://github.com/streetsidesoftware/cspell-action/blob/main/CHANGELOG.md)
- [Commits](streetsidesoftware/cspell-action@v6.6.0...v6.7.0)

---
updated-dependencies:
- dependency-name: streetsidesoftware/cspell-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

.github/workflows/validate-documentation.yml

@@ -26,7 +26,7 @@ jobs:
         fail: true
         args: "--threads 1 --max-concurrency 1 --verbose --no-progress './**/*.md' './**/*.html'"
 
-    - uses: streetsidesoftware/cspell-action@v6.6.0
+    - uses: streetsidesoftware/cspell-action@v6.7.0
       with:
         files: '**/*.md'