chore(deps): bump @mui/material from 5.2.8 to 5.3.1 (#231)

Bumps [@mui/material](https://github.com/mui-org/material-ui/tree/HEAD/packages/mui-material) from 5.2.8 to 5.3.1.
- [Release notes](https://github.com/mui-org/material-ui/releases)
- [Changelog](https://github.com/mui-org/material-ui/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mui-org/material-ui/commits/v5.3.1/packages/mui-material)

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

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package.json

@@ -17,7 +17,7 @@
     "@fontsource/lexend-deca": "4.4.5",
     "@fontsource/montserrat": "4.4.5",
     "@mui/icons-material": "5.3.1",
-    "@mui/material": "5.2.8",
+    "@mui/material": "5.3.1",
     "react": "17.0.2",
     "react-clock": "3.0.0",
     "react-color-gradient-picker": "0.1.2",