fix: upgrade @mui/material from 5.15.18 to 5.15.20

Snyk has created this PR to upgrade @mui/material from 5.15.18 to 5.15.20.

See this package in npm:
@mui/material

See this project in Snyk:
https://app.snyk.io/org/juaneortiz1/project/3a2d0434-2d0d-4aa4-9f9d-286dc1b586e1?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

package-lock.json

@@ -6,7 +6,7 @@
     "@emotion/react": "^11.11.4",
     "@emotion/styled": "^11.11.5",
     "@mui/icons-material": "^5.15.15",
-    "@mui/material": "^5.15.15",
+    "@mui/material": "^5.15.20",
     "@react-spring/web": "9.5.5",
     "@syncfusion/ej2-react-calendars": "^25.1.42",
     "@testing-library/jest-dom": "^6.4.2",