build(deps): bump @mui/material from 5.15.20 to 5.16.6

Bumps [@mui/material](https://github.com/mui/material-ui/tree/HEAD/packages/mui-material) from 5.15.20 to 5.16.6.
- [Release notes](https://github.com/mui/material-ui/releases)
- [Changelog](https://github.com/mui/material-ui/blob/v5.16.6/CHANGELOG.md)
- [Commits](https://github.com/mui/material-ui/commits/v5.16.6/packages/mui-material)

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

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -10,7 +10,7 @@
 		"@minoru/react-dnd-treeview": "^3.4.4",
 		"@mui/icons-material": "^5.15.19",
 		"@mui/lab": "^5.0.0-alpha.170",
-		"@mui/material": "^5.15.20",
+		"@mui/material": "^5.16.6",
 		"@mui/x-data-grid": "^6.19.8",
 		"@testing-library/jest-dom": "^6.4.6",
 		"@testing-library/react": "^12.1.2",