build(deps-dev): bump eslint-config-next from 15.5.5 to 15.5.6

Bumps [eslint-config-next](https://github.com/vercel/next.js/tree/HEAD/packages/eslint-config-next) from 15.5.5 to 15.5.6.
- [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/v15.5.6/packages/eslint-config-next)

---
updated-dependencies:
- dependency-name: eslint-config-next
  dependency-version: 15.5.6
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package.json

@@ -28,7 +28,7 @@
     "@types/react-dom": "18.3.1",
     "typescript": "5.9.3",
     "eslint": "9.37.0",
-    "eslint-config-next": "15.5.5",
+    "eslint-config-next": "15.5.6",
     "prettier": "^3.5.3",
     "prettier-plugin-tailwindcss": "^0.6.11",
     "tailwindcss": "3.4.15",