Update docs.yml

Author: Diego-Espindola

.github/workflows/docs.yml

@@ -21,6 +21,11 @@ jobs:
         run: |
           pip install -r requirements.txt
 
+      
+      - name: Build Sphinx docs
+        run: |
+          sphinx-build -b html docs docs/_build/html
+
       - name: Export OpenAPI schema
         env:
           SECRET_KEY: dummy