Merge pull request #974 from porink0424/fix/mui-upgrade-to-v6

Upgrade MUI to v6

Author: c-bata

jupyterlab/package.json

@@ -54,9 +54,9 @@
         "@jupyterlab/coreutils": "^6.0.0",
         "@jupyterlab/launcher": "^4.0.0",
         "@jupyterlab/services": "^7.0.0",
-        "@mui/icons-material": "^5.11.6",
-        "@mui/lab": "^5.0.0-alpha.128",
-        "@mui/material": "^5.12.1",
+        "@mui/icons-material": "^6.1.1",
+        "@mui/lab": "^6.0.0-beta.10",
+        "@mui/material": "^6.1.1",
         "@optuna/optuna-dashboard": "link:../optuna_dashboard",
         "@types/chroma-js": "^2.4.1",
         "@types/signals": "^1.0.2",