fix: examples/web3-provider/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-REQUEST-3361831
- https://snyk.io/vuln/SNYK-JS-TAR-6476909
- https://snyk.io/vuln/SNYK-JS-WEB3UTILS-6229337
- https://snyk.io/vuln/SNYK-JS-WS-1296835

examples/web3-provider/package.json

@@ -8,6 +8,6 @@
   "dependencies": {
     "@openzeppelin/defender-relay-client": "1.54.1",
     "dotenv": "^8.2.0",
-    "web3": "^1.8.2"
+    "web3": "^4.0.1"
   }
 }