chore(deps): bump next from 15.1.3 to 15.4.8

Bumps [next](https://github.com/vercel/next.js) from 15.1.3 to 15.4.8.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v15.1.3...v15.4.8)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 15.4.8
  dependency-type: direct:production
...

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

Author: dependabot[bot]

bids-validator/package.json

@@ -53,7 +53,7 @@
     "lerna": "^8.1.9",
     "lodash": "^4.17.21",
     "minimatch": "3.0.5",
-    "next": "15.1.3",
+    "next": "15.4.8",
     "nifti-js": "^1.0.1",
     "p-limit": "^2.1.0",
     "pako": "^1.0.6",