Bump @mui/icons-material from 5.15.18 to 5.16.7 in /client

Bumps [@mui/icons-material](https://github.com/mui/material-ui/tree/HEAD/packages/mui-icons-material) from 5.15.18 to 5.16.7.
- [Release notes](https://github.com/mui/material-ui/releases)
- [Changelog](https://github.com/mui/material-ui/blob/v5.16.7/CHANGELOG.md)
- [Commits](https://github.com/mui/material-ui/commits/v5.16.7/packages/mui-icons-material)

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

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

client/package.json

@@ -8,7 +8,7 @@
     "@emotion/react": "^11.11.4",
     "@emotion/styled": "^11.11.5",
     "@fontsource/roboto": "^5.0.13",
-    "@mui/icons-material": "^5.15.18",
+    "@mui/icons-material": "^5.16.7",
     "@mui/material": "^5.15.18",
     "@testing-library/jest-dom": "^5.17.0",
     "@testing-library/react": "^15.0.7",