Bump next from 15.5.4 to 15.5.5 (#353)

Bumps [next](https://github.com/vercel/next.js) from 15.5.4 to 15.5.5.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v15.5.4...v15.5.5)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 15.5.5
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package-lock.json

@@ -19,7 +19,7 @@
     "@navikt/next-logger": "^2.1.0",
     "@tanstack/react-form": "^1.23.7",
     "@navikt/oasis": "^3.8.0",
-    "next": "^15.5.4",
+    "next": "^15.5.5",
     "pino": "^9.13.0",
     "pino-pretty": "^13.1.2",
     "pino-roll": "^3.1.0",