Update pip install for docs builder

Author: haillew

.github/workflows/main-docs.yml

@@ -30,7 +30,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install sphinx sphinx-rtd-theme myst-parser sphinx-design sphinx-tabs
+          pip install -r requirements-dev.txt
 
       - name: Build HTML
         run: |