Update material-ui monorepo to v5.15.8

Author: renovate[bot]

package.json

@@ -13,8 +13,8 @@
   "dependencies": {
     "@emotion/react": "11.11.1",
     "@emotion/styled": "11.11.0",
-    "@mui/icons-material": "5.14.14",
-    "@mui/material": "5.14.14",
+    "@mui/icons-material": "5.15.8",
+    "@mui/material": "5.15.8",
     "@testing-library/jest-dom": "5.17.0",
     "@testing-library/react": "14.0.0",
     "@testing-library/user-event": "14.5.1",