fix(deps): update material-ui monorepo to v6.1.9

Author: renovate[bot]

packages/frontend/package.json

@@ -32,9 +32,9 @@
     "@hono/zod-openapi": "0.18.0",
     "@hookform/resolvers": "3.9.1",
     "@lucia-auth/adapter-drizzle": "1.1.0",
-    "@mui/icons-material": "6.1.8",
+    "@mui/icons-material": "6.1.9",
     "@mui/lab": "5.0.0-alpha.173",
-    "@mui/material": "6.1.8",
+    "@mui/material": "6.1.9",
     "@mui/x-date-pickers": "7.22.3",
     "@scalar/hono-api-reference": "0.5.161",
     "@t3-oss/env-core": "0.11.1",