chore(deps): bump @mui/material from 5.14.20 to 5.15.19 (#4502)

Bumps [@mui/material](https://github.com/mui/material-ui/tree/HEAD/packages/mui-material) from 5.14.20 to 5.15.19.
- [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-material)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

apps/dashboard/package.json

@@ -21,7 +21,7 @@
     "@emotion/styled": "^11.11.0",
     "@mui/icons-material": "^5.14.19",
     "@mui/joy": "5.0.0-beta.21",
-    "@mui/material": "^5.14.20",
+    "@mui/material": "^5.15.19",
     "@opentelemetry/api": "^1.8.0",
     "@opentelemetry/core": "1.24.1",
     "@opentelemetry/exporter-trace-otlp-http": "^0.51.1",

apps/voucher/package.json

@@ -30,7 +30,7 @@
     "@emotion/styled": "^11.11.0",
     "@headlessui/react": "^2.0.3",
     "@mui/icons-material": "^5.11.16",
-    "@mui/material": "^5.13.5",
+    "@mui/material": "^5.15.19",
     "@opentelemetry/api": "1.8.0",
     "@opentelemetry/core": "1.24.1",
     "@opentelemetry/exporter-trace-otlp-http": "0.51.1",