Bump @mui/styles from 5.15.7 to 5.15.8 (#463)

Bumps [@mui/styles](https://github.com/mui/material-ui/tree/HEAD/packages/mui-styles) from 5.15.7 to 5.15.8.
- [Release notes](https://github.com/mui/material-ui/releases)
- [Changelog](https://github.com/mui/material-ui/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mui/material-ui/commits/v5.15.8/packages/mui-styles)

---
updated-dependencies:
- dependency-name: "@mui/styles"
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -23,7 +23,7 @@
   "dependencies": {
     "@mui/icons-material": "^5.15.7",
     "@mui/material": "^5.15.7",
-    "@mui/styles": "^5.14.10",
+    "@mui/styles": "^5.15.8",
     "papaparse": "^5.4.1",
     "ra-language-chinese": "^2.0.10",
     "ra-language-french": "^4.16.9",