build(deps): bump next from 14.2.21 to 15.4.6 in /media

Bumps [next](https://github.com/vercel/next.js) from 14.2.21 to 15.4.6.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v14.2.21...v15.4.6)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 15.4.6
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

media/package.json

@@ -21,7 +21,7 @@
     "antd": "^5.23.2",
     "load-script": "^2.0.0",
     "lodash": "^4.17.20",
-    "next": "^14.2.21",
+    "next": "^15.4.6",
     "pontx-semix-table": "0.5.3",
     "pontx-ui": "latest",
     "react": "^18.3.1",