Bump next from 12.3.7 to 15.5.10

Bumps [next](https://github.com/vercel/next.js) from 12.3.7 to 15.5.10.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v12.3.7...v15.5.10)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 15.5.10
  dependency-type: direct:production
...

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

Author: dependabot[bot]

package.json

@@ -57,7 +57,7 @@
     "lodash": "^4.17.23",
     "luxon": "^3.5.0",
     "million": "^2.6.4",
-    "next": "^12.3.4",
+    "next": "^15.5.10",
     "next-transpile-modules": "^10.0.1",
     "nextjs-current-url": "^1.0.3",
     "openai": "^4.86.1",