chore: bump dotenv from 10.0.0 to 16.4.7 in /examples/update-monitor

Bumps [dotenv](https://github.com/motdotla/dotenv) from 10.0.0 to 16.4.7.
- [Changelog](https://github.com/motdotla/dotenv/blob/master/CHANGELOG.md)
- [Commits](motdotla/dotenv@v10.0.0...v16.4.7)

---
updated-dependencies:
- dependency-name: dotenv
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

examples/update-monitor/package.json

@@ -10,6 +10,6 @@
   },
   "dependencies": {
     "@openzeppelin/defender-sdk": "2.1.0",
-    "dotenv": "^16.3.1"
+    "dotenv": "^16.4.7"
   }
 }