fix: examples/update-autotask-env-variables/package.json to reduce vu…

…lnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-AXIOS-7361793

examples/update-autotask-env-variables/package.json

@@ -9,7 +9,7 @@
     "run": "node index.js"
   },
   "dependencies": {
-    "@openzeppelin/defender-autotask-client": "1.54.2",
+    "@openzeppelin/defender-autotask-client": "1.54.6",
     "dotenv": "^8.2.0"
   }
 }