Fix screenshot comparison workflow.

Author: Taylor-96

.github/workflows/screenshot-comparison.yml

@@ -25,7 +25,7 @@ jobs:
         python-version: '3.11'
         architecture: 'x64'
     - name: Install dependencies
-      run: 
+      run: |
         pip install --upgrade pip
         pip install --upgrade jupyterlab
         pip install --upgrade voila