ci(docs): update workflow

.github/workflows/documentation.yml

@@ -60,6 +60,7 @@ jobs:
           pip install mkdocs
           pip install mkdocs-material
           pip install mkdocs-git-committers-plugin-2
+          pip install mkdocs-encryptcontent-plugin
           pip install mkdocs-redirects mkdocs-glightbox pymdown-extensions mkdocs-git-revision-date-localized-plugin mkdocs-git-authors-plugin mkdocs-link-embeds-plugin
           cd docs
           mkdocs build