Bump @playwright/test from 1.55.1 to 1.56.0 in /env (#299)

Bumps [@playwright/test](https://github.com/microsoft/playwright) from 1.55.1 to 1.56.0.
- [Release notes](https://github.com/microsoft/playwright/releases)
- [Commits](microsoft/playwright@v1.55.1...v1.56.0)

---
updated-dependencies:
- dependency-name: "@playwright/test"
  dependency-version: 1.56.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]

env/package-lock.json

@@ -13,7 +13,7 @@
 	},
 	"homepage": "https://github.com/swissspidy/wp-performance-action#readme",
 	"dependencies": {
-		"@playwright/test": "^1.55.1",
+		"@playwright/test": "^1.56.0",
 		"@wordpress/e2e-test-utils-playwright": "^1.32.0",
 		"@wp-playground/cli": "^2.0.20",
 		"kill-port": "^2.0.1",