Replace mkdocs gh-deploy with zensical build --clean in docs workflows

Author: coordt

.github/workflows/publish-docs-preview.yaml

@@ -42,7 +42,7 @@ jobs:
       run: uv sync --group docs
 
     - name: Build and publish docs
-      run: uv run mkdocs gh-deploy --strict
+      run: uv run zensical build --clean
 
     - name: Build and publish docs preview
       uses: rossjrw/pr-preview-action@v1

.github/workflows/publish-docs.yaml

@@ -38,9 +38,7 @@ jobs:
       run: uv sync --group docs
 
     - name: Build and publish docs
-      run: uv run mkdocs gh-deploy --strict
-
-    - run: zensical build --clean
+      run: uv run zensical build --clean
 
     - uses: actions/upload-pages-artifact@v5
       with: