Update @mui/icons-material requirement in /src-admin

Updates the requirements on [@mui/icons-material](https://github.com/mui/material-ui/tree/HEAD/packages/mui-icons-material) to permit the latest version.
- [Release notes](https://github.com/mui/material-ui/releases)
- [Changelog](https://github.com/mui/material-ui/blob/v5.15.19/CHANGELOG.md)
- [Commits](https://github.com/mui/material-ui/commits/v5.15.19/packages/mui-icons-material)

---
updated-dependencies:
- dependency-name: "@mui/icons-material"
  dependency-type: direct:development
...

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

src-admin/package.json

@@ -12,7 +12,7 @@
         "@emotion/react": "^11.11.4",
         "@emotion/styled": "^11.11.5",
         "@iobroker/adapter-react-v5": "^4.13.24",
-        "@mui/icons-material": "^5.15.18",
+        "@mui/icons-material": "^5.15.19",
         "@mui/material": "5.15.18",
         "@mui/styles": "5.15.18",
         "@mui/x-date-pickers": "^7.5.1",