Merge pull request diffpy#88 from Sparks29032/doc_refactor

Fix documentation workflow

Author: Sparks29032

.github/workflows/docs.yml

@@ -34,10 +34,10 @@ jobs:
         run: python -m pip install . --no-deps
 
       - name: build documents
-        run: make -C doc/manual html
+        run: make -C doc html
 
       - name: Deploy
         uses: peaceiris/actions-gh-pages@v3
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
-          publish_dir: ./doc/manual/build/html
+          publish_dir: ./doc/build/html