deps: bump next from 14.2.26 to 15.2.4

Bumps [next](https://github.com/vercel/next.js) from 14.2.26 to 15.2.4.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v14.2.26...v15.2.4)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 15.2.4
  dependency-type: direct:production
...

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

Author: dependabot[bot]

package.json

@@ -36,7 +36,7 @@
     "i18next": "^23.10.1",
     "ics": "^3.7.2",
     "lodash": "^4.17.21",
-    "next": "14.2.26",
+    "next": "15.2.4",
     "next-auth": "^4.24.7",
     "next-i18next": "^15.2.0",
     "react": "18.2.0",