fix: upgrade @mui/material from 5.11.8 to 5.15.8

Snyk has created this PR to upgrade @mui/material from 5.11.8 to 5.15.8.

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

See this project in Snyk:
https://app.snyk.io/org/etherspot/project/f7e6e9a0-4639-49bf-9fba-ed78feffb9ec?utm_source=github&utm_medium=referral&page=upgrade-pr

example/package.json

@@ -7,7 +7,7 @@
     "@emotion/styled": "^11.10.5",
     "@etherspot/transaction-kit": "file:./../",
     "@mui/lab": "^5.0.0-alpha.118",
-    "@mui/material": "^5.11.7",
+    "@mui/material": "^5.15.8",
     "@types/node": "^16.18.11",
     "@types/react": "^18.0.27",
     "@types/react-dom": "^18.0.10",