ci: use pnpm exec for playwright install to match lockfile version (#415)

Co-authored-by: Amp <amp@ampcode.com>

Author: fi3ework

.github/workflows/ci.yaml

@@ -32,7 +32,7 @@ jobs:
         run: pnpm install
 
       - name: Install Playwright browsers
-        run: pnpm dlx playwright install chromium
+        run: pnpm --filter @rstest-example/browser-locator exec playwright install --with-deps chromium
 
       - name: Build Rspack
         run: |