fix(deps): update nextjs monorepo to v15.4.1 (#3632)

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

packages/modals-collection/package.json

@@ -36,7 +36,7 @@
     "@mantine/core": "^8.1.3",
     "@tabler/icons-react": "^3.34.0",
     "dayjs": "^1.11.13",
-    "next": "15.3.5",
+    "next": "15.4.1",
     "react": "19.1.0",
     "react-dom": "19.1.0",
     "zod": "^3.25.76"