Update Handbook

.github/workflows/publish-handbook.yml

@@ -33,7 +33,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install mkdocs-material
+          pip install black mkdocs-material mkdocs-ultralytics-plugin
 
       - name: Build site
         run: mkdocs build