[vite-plugin-cloudflare] simplify playground playwright install (#8141)

Author: dario-piotrowicz

packages/vite-plugin-cloudflare/playground/package.json

@@ -6,7 +6,7 @@
 	"scripts": {
 		"check:types": "tsc --build",
 		"test:build": "cross-env VITE_TEST_BUILD=1 vitest run -c vitest.config.e2e.ts",
-		"pretest:ci": "pnpm exec playwright install-deps && pnpm exec playwright install",
+		"pretest:ci": "pnpm playwright install chromium",
 		"test:ci": "pnpm test:serve && pnpm test:build",
 		"test:serve": "vitest run -c vitest.config.e2e.ts"
 	},