Bump reviewdog/action-markdownlint from 0.3 to 0.5 (#22)

Bumps [reviewdog/action-markdownlint](https://github.com/reviewdog/action-markdownlint) from 0.3 to 0.5.
- [Release notes](https://github.com/reviewdog/action-markdownlint/releases)
- [Commits](reviewdog/action-markdownlint@v0.3...v0.5)

---
updated-dependencies:
- dependency-name: reviewdog/action-markdownlint
  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/reviewdog.yml

@@ -40,7 +40,7 @@ jobs:
           submodules: false
 
       - name: markdownlint
-        uses: reviewdog/action-markdownlint@v0.3
+        uses: reviewdog/action-markdownlint@v0.5
         with:
           reporter: github-pr-review
           fail_on_error: true