fix(deps): update nextjs monorepo to v15.5.4 (#4178)

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

apps/nextjs/package.json

@@ -76,7 +76,7 @@
     "glob": "^11.0.3",
     "jotai": "^2.14.0",
     "mantine-react-table": "2.0.0-beta.9",
-    "next": "15.5.3",
+    "next": "15.5.4",
     "postcss-preset-mantine": "^1.18.0",
     "prismjs": "^1.30.0",
     "react": "19.1.1",