Bump kayahr/deploy-github-pages-action from 4 to 6

Bumps [kayahr/deploy-github-pages-action](https://github.com/kayahr/deploy-github-pages-action) from 4 to 6.
- [Commits](kayahr/deploy-github-pages-action@v4...v6)

---
updated-dependencies:
- dependency-name: kayahr/deploy-github-pages-action
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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Author: dependabot[bot]

.github/workflows/ci.yml

@@ -22,6 +22,6 @@ jobs:
         run: npm run apidoc
       - name: Deploy API Doc
         if: github.ref == 'refs/heads/main'
-        uses: kayahr/deploy-github-pages-action@v4
+        uses: kayahr/deploy-github-pages-action@v6
         with:
           path: lib/apidoc