Fix typo in pip install for documentation

Author: ndem0

.github/workflows/cd.yml

@@ -25,7 +25,7 @@ jobs:
       run: |
         conda install --yes -c conda-forge pythonocc-core 
         python -m pip install --upgrade pip
-        python -m pip install .[doc]
+        python -m pip install .[docs]
 
     - name: Build Documentation
       run: |