chore(deps-dev): bump the dev-dependencies group across 1 directory with 3 updates

Bumps the dev-dependencies group with 3 updates in the /www directory: [@tailwindcss/postcss](https://github.com/tailwindlabs/tailwindcss/tree/HEAD/packages/@tailwindcss-postcss), [eslint-config-next](https://github.com/vercel/next.js/tree/HEAD/packages/eslint-config-next) and [tailwindcss](https://github.com/tailwindlabs/tailwindcss/tree/HEAD/packages/tailwindcss).


Updates `@tailwindcss/postcss` from 4.1.18 to 4.2.2
- [Release notes](https://github.com/tailwindlabs/tailwindcss/releases)
- [Changelog](https://github.com/tailwindlabs/tailwindcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/tailwindlabs/tailwindcss/commits/v4.2.2/packages/@tailwindcss-postcss)

Updates `eslint-config-next` from 16.1.6 to 16.2.1
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](https://github.com/vercel/next.js/commits/v16.2.1/packages/eslint-config-next)

Updates `tailwindcss` from 4.1.18 to 4.2.2
- [Release notes](https://github.com/tailwindlabs/tailwindcss/releases)
- [Changelog](https://github.com/tailwindlabs/tailwindcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/tailwindlabs/tailwindcss/commits/v4.2.2/packages/tailwindcss)

---
updated-dependencies:
- dependency-name: "@tailwindcss/postcss"
  dependency-version: 4.2.2
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: dev-dependencies
- dependency-name: eslint-config-next
  dependency-version: 16.2.1
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: dev-dependencies
- dependency-name: tailwindcss
  dependency-version: 4.2.2
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: dev-dependencies
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

www/package.json

@@ -21,7 +21,7 @@
     "@types/react": "^19",
     "@types/react-dom": "^19",
     "eslint": "^9",
-    "eslint-config-next": "16.1.6",
+    "eslint-config-next": "16.2.1",
     "tailwindcss": "^4",
     "typescript": "^5"
   }