fix(deps): update nextjs monorepo to v15.5.0 (#3896)

Co-authored-by: homarr-renovate[bot] <158783068+homarr-renovate[bot]@users.noreply.github.com>

packages/api/package.json

@@ -48,7 +48,7 @@
     "@trpc/server": "^11.4.4",
     "@trpc/tanstack-react-query": "^11.4.4",
     "lodash.clonedeep": "^4.5.0",
-    "next": "15.4.7",
+    "next": "15.5.0",
     "react": "19.1.1",
     "react-dom": "19.1.1",
     "superjson": "2.2.2",