build(deps): bump the mui group with 1 update

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


Updates `@mui/material` from 5.14.19 to 5.15.0
- [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/v5.15.0/packages/mui-material)

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

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

client/package.json

@@ -8,7 +8,7 @@
   },
   "dependencies": {
     "@emotion/styled": "^11.1.5",
-    "@mui/material": "^5.14.18",
+    "@mui/material": "^5.15.0",
     "@u-wave/react-server-list": "file:../react-server-list",
     "react": "^18.2.0",
     "react-dom": "^18.0.0"

react-server-list/package.json

@@ -29,7 +29,7 @@
   },
   "dependencies": {
     "@babel/runtime": "^7.23.6",
-    "@mui/material": "^5.14.18",
+    "@mui/material": "^5.15.0",
     "date-fns": "^2.29.3",
     "node-fetch": "^3.3.1",
     "prop-types": "^15.7.2",