Bump reviewdog/action-languagetool from 1.5 to 1.9

Bumps [reviewdog/action-languagetool](https://github.com/reviewdog/action-languagetool) from 1.5 to 1.9.
- [Release notes](https://github.com/reviewdog/action-languagetool/releases)
- [Commits](reviewdog/action-languagetool@v1.5...v1.9)

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

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

.github/workflows/reviewdog.yml

@@ -73,7 +73,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/[email protected]
-      - uses: reviewdog/action-languagetool@v1.5
+      - uses: reviewdog/action-languagetool@v1.9
         with:
           github_token: ${{ secrets.github_token }}
           reporter: github-check