Update @mui/icons-material requirement from ^5.14.19 to ^5.15.7 in /src

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/master/CHANGELOG.md)
- [Commits](https://github.com/mui/material-ui/commits/v5.15.7/packages/mui-icons-material)

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

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

src/package.json

@@ -4,7 +4,7 @@
     "private": true,
     "dependencies": {
         "@iobroker/adapter-react-v5": "^4.7.6",
-        "@mui/icons-material": "^5.14.19",
+        "@mui/icons-material": "^5.15.7",
         "@mui/material": "5.14.14",
         "@mui/styles": "5.14.14",
         "babel-eslint": "^10.1.0",