Install git-lfs in the Playwright image for proper functionality

Author: leonard84

.github/workflows/verify.yaml

@@ -51,6 +51,13 @@ jobs:
             run:
                 working-directory: ./spock-website
         steps:
+            # Unlike the default image, the playwright image does not have git-lfs installed
+            -   name: Install git-lfs
+                run: |
+                    apt-get update
+                    apt-get install -y git-lfs
+                working-directory: ./ # the default only exists after checkout
+
             -   name: Checkout
                 uses: actions/checkout@v6
                 with: