fix(deps): replace dependency @material-ui/core with @mui/material

Author: renovate-coveo[bot]

.github/package.json

@@ -8,7 +8,7 @@
   "main": "src/index.tsx",
   "dependencies": {
     "@coveo/headless": "1.32.0",
-    "@material-ui/core": "4.11.0",
+    "@mui/material": "5.0.0",
     "@material-ui/icons": "4.11.2",
     "@material-ui/lab": "4.0.0-alpha.56",
     "cross-fetch": "3.0.5",