chore(deps): bump playwright and @playwright/test in /2025 (#611)

Bumps [playwright](https://github.com/microsoft/playwright) to 1.56.1 and updates ancestor dependency [@playwright/test](https://github.com/microsoft/playwright). These dependencies need to be updated together.


Updates `playwright` from 1.55.0 to 1.56.1
- [Release notes](https://github.com/microsoft/playwright/releases)
- [Commits](microsoft/playwright@v1.55.0...v1.56.1)

Updates `@playwright/test` from 1.55.0 to 1.56.1
- [Release notes](https://github.com/microsoft/playwright/releases)
- [Commits](microsoft/playwright@v1.55.0...v1.56.1)

---
updated-dependencies:
- dependency-name: playwright
  dependency-version: 1.56.1
  dependency-type: indirect
- dependency-name: "@playwright/test"
  dependency-version: 1.56.1
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Shingo Inoue <leko.noor@gmail.com>

Author: dependabot[bot]

2025/package-lock.json

@@ -27,7 +27,7 @@
   "devDependencies": {
     "@eslint/eslintrc": "^3",
     "@next/bundle-analyzer": "^15.3.3",
-    "@playwright/test": "^1.55.0",
+    "@playwright/test": "^1.56.1",
     "@tailwindcss/postcss": "^4",
     "@types/mdx": "^2.0.13",
     "@types/node": "^20",