build(deps): bump @mui/material from 5.15.21 to 5.16.6

Bumps [@mui/material](https://github.com/mui/material-ui/tree/HEAD/packages/mui-material) from 5.15.21 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] <[email protected]>

package.json

@@ -15,7 +15,7 @@
     "@glidejs/glide": "^3.6.0",
     "@iconify/react": "^5.0.1",
     "@mui/icons-material": "^5.15.11",
-    "@mui/material": "^5.15.21",
+    "@mui/material": "^5.16.6",
     "html-to-text": "^9.0.5",
     "js-cookie": "^3.0.5",
     "next": "^14.1.1",