Bump mhausenblas/mkdocs-deploy-gh-pages from 1.18 to 1.19

Bumps [mhausenblas/mkdocs-deploy-gh-pages](https://github.com/mhausenblas/mkdocs-deploy-gh-pages) from 1.18 to 1.19.
- [Release notes](https://github.com/mhausenblas/mkdocs-deploy-gh-pages/releases)
- [Commits](https://github.com/mhausenblas/mkdocs-deploy-gh-pages/compare/1.18...bb14c9f06e34abc598ee9872948d85fa60b155ff)

Signed-off-by: dependabot[bot] <support@github.com>
Change-Id: I3abd56dfc5ee54328750c541b030680655c42280
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b103cf1..a70c656 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -15,6 +15,6 @@
           fetch-depth: 0
 
       - name: Deploy docs
-        uses: mhausenblas/mkdocs-deploy-gh-pages@1.18
+        uses: mhausenblas/mkdocs-deploy-gh-pages@1.19
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}