Bump @mui/x-tree-view from 7.20.0 to 7.21.0 in the material-ui group

Bumps the material-ui group with 1 update: [@mui/x-tree-view](https://github.com/mui/mui-x/tree/HEAD/packages/x-tree-view).


Updates `@mui/x-tree-view` from 7.20.0 to 7.21.0
- [Release notes](https://github.com/mui/mui-x/releases)
- [Changelog](https://github.com/mui/mui-x/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mui/mui-x/commits/v7.21.0/packages/x-tree-view)

---
updated-dependencies:
- dependency-name: "@mui/x-tree-view"
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: material-ui
...

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

Author: dependabot[bot]

package-lock.json

@@ -109,7 +109,7 @@
 		"@mui/lab": "^6.0.0-beta.12",
 		"@mui/material": "^6.1.0",
 		"@mui/styles": "^6.1.4",
-		"@mui/x-tree-view": "^7.20.0",
+		"@mui/x-tree-view": "^7.21.0",
 		"@rjsf/core": "^5.21.2",
 		"@rjsf/mui": "^5.21.2",
 		"@rjsf/utils": "^5.21.2",