Change Hugo source path to docs/.

Author: Potherca

.github/workflows/hugo.yaml

@@ -66,6 +66,7 @@ jobs:
             hugo-
       - name: Build with Hugo
         run: |
+          cd docs;
           hugo \
             --gc \
             --minify \
@@ -81,7 +82,7 @@ jobs:
       - name: Upload artifact
         uses: actions/upload-pages-artifact@v3
         with:
-          path: ./public
+          path: docs/public
 
   # Deployment job
   deploy: