Bump @mui/icons-material from 5.15.7 to 5.15.8

Bumps [@mui/icons-material](https://github.com/mui/material-ui/tree/HEAD/packages/mui-icons-material) from 5.15.7 to 5.15.8.
- [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/v5.15.8/packages/mui-icons-material)

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

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

Author: dependabot[bot]

package-lock.json

@@ -23,7 +23,7 @@
   "devDependencies": {
     "@emotion/react": "^11.11.3",
     "@emotion/styled": "^11.11.0",
-    "@mui/icons-material": "^5.15.7",
+    "@mui/icons-material": "^5.15.8",
     "@mui/material": "^5.15.7",
     "@primer/octicons-react": "^19.8.0",
     "@types/react": "^18.2.54",