chore(deps-dev): bump @mui/icons-material in /src-admin

Bumps [@mui/icons-material](https://github.com/mui/material-ui/tree/HEAD/packages/mui-icons-material) from 5.16.14 to 6.4.2.
- [Release notes](https://github.com/mui/material-ui/releases)
- [Changelog](https://github.com/mui/material-ui/blob/v6.4.2/CHANGELOG.md)
- [Commits](https://github.com/mui/material-ui/commits/v6.4.2/packages/mui-icons-material)

---
updated-dependencies:
- dependency-name: "@mui/icons-material"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

src-admin/package.json

@@ -12,7 +12,7 @@
         "@iobroker/json-config": "^7.4.19",
         "@iobroker/adapter-react-v5": "^6.1.9",
         "@mui/material": "^5.16.7",
-        "@mui/icons-material": "^5.16.13",
+        "@mui/icons-material": "^6.4.2",
         "prop-types": "^15.8.1",
         "react": "^18.3.1",
         "react-dom": "^18.3.1",