Bump @mui/styles from 5.14.20 to 5.15.0

Bumps [@mui/styles](https://github.com/mui/material-ui/tree/HEAD/packages/mui-styles) from 5.14.20 to 5.15.0.
- [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/v5.15.0/packages/mui-styles)

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

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

Author: dependabot[bot]

package-lock.json

@@ -101,7 +101,7 @@
 		"@mui/icons-material": "^5.14.19",
 		"@mui/lab": "^5.0.0-alpha.156",
 		"@mui/material": "^5.15.0",
-		"@mui/styles": "^5.14.20",
+		"@mui/styles": "^5.15.0",
 		"@rjsf/core": "^5.15.1",
 		"@rjsf/mui": "^5.15.1",
 		"@rjsf/utils": "^5.15.1",