chore: [Snyk] Upgrade @mui/material from 5.15.14 to 5.15.15 (#2424)

fix: upgrade @mui/material from 5.15.14 to 5.15.15

Snyk has created this PR to upgrade @mui/material from 5.15.14 to 5.15.15.

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

See this project in Snyk:
https://app.snyk.io/org/json-rpc-relay/project/baf29319-5e17-4aff-8e1f-4108d3e10c45?utm_source=github&utm_medium=referral&page=upgrade-pr

Co-authored-by: snyk-bot <[email protected]>

Author: swirlds-automation

dapp-example/package-lock.json

@@ -6,7 +6,7 @@
     "@emotion/react": "^11.11.4",
     "@emotion/styled": "^11.11.0",
     "@hashgraph/sdk": "^2.43.0",
-    "@mui/material": "^5.15.12",
+    "@mui/material": "^5.15.15",
     "ethers": "^5.6.8",
     "react": "^18.1.0",
     "react-dom": "^18.1.0",