Update Playwright cache key to exclude uv.lock

Modified the Playwright cache key in the GitHub Actions workflow to use only 'pyproject.toml' for hashing, removing 'uv.lock' from the key. This may help reduce unnecessary cache invalidations when only the lock file changes.

Author: karangattu

.github/workflows/verify-test-generation-prompts.yaml

@@ -47,7 +47,7 @@ jobs:
         id: playwright-cache
         with:
           path: ~/.cache/ms-playwright
-          key: ${{ runner.os }}-playwright-${{ hashFiles('pyproject.toml', 'uv.lock') }}
+          key: ${{ runner.os }}-playwright-${{ hashFiles('pyproject.toml') }}
 
       - name: Install Playwright browsers
         if: steps.playwright-cache.outputs.cache-hit != 'true'