Bump @mui/system from 6.1.4 to 6.1.5

Bumps [@mui/system](https://github.com/mui/material-ui/tree/HEAD/packages/mui-system) from 6.1.4 to 6.1.5.
- [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/v6.1.5/packages/mui-system)

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

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

package.json

@@ -25,7 +25,7 @@
     "@mui/base": "5.0.0-beta.59",
     "@mui/icons-material": "^5.16.7",
     "@mui/material": "^5.16.7",
-    "@mui/system": "^6.1.4",
+    "@mui/system": "^6.1.5",
     "@remix-run/node": "^2.13.1",
     "@remix-run/react": "^2.13.1",
     "@remix-run/serve": "^2.13.1",