fix: upgrade @mui/material from 5.11.6 to 5.15.4

Snyk has created this PR to upgrade @mui/material from 5.11.6 to 5.15.4.

See this package in npm:
https://www.npmjs.com/package/@mui/material

See this project in Snyk:
https://app.snyk.io/org/vorge/project/8f6984c1-87ff-4e43-a5dc-b0ce09984d4e?utm_source=github&utm_medium=referral&page=upgrade-pr