Bump next from 15.4.6 to 15.5.6

Bumps [next](https://github.com/vercel/next.js) from 15.4.6 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](vercel/next.js@v15.4.6...v15.5.6)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 15.5.6
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package.json

@@ -19,7 +19,7 @@
     "dotenv-cli": "^10.0.0",
     "eslint": "^9.32.0",
     "eslint-config-next": "~15.4.6",
-    "next": "~15.4.6",
+    "next": "~15.5.6",
     "react": "19.1.1",
     "react-date-picker": "^12.0.1",
     "react-dom": "19.1.1",