ci: add training dependencies in build workflow

.github/workflows/build.yml

@@ -22,7 +22,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install .[testing,quality]
+          pip install .[training,testing,quality]
 
       - name: Check isort
         uses: isort/isort-action@v1