Bump dotenv from 8.6.0 to 16.3.1 in /examples/unpause-proposal

Bumps [dotenv](https://github.com/motdotla/dotenv) from 8.6.0 to 16.3.1.
- [Changelog](https://github.com/motdotla/dotenv/blob/master/CHANGELOG.md)
- [Commits](motdotla/dotenv@v8.6.0...v16.3.1)

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

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

examples/unpause-proposal/package.json

@@ -10,6 +10,6 @@
   },
   "dependencies": {
     "@openzeppelin/defender-admin-client": "1.51.0-rc.0",
-    "dotenv": "^8.2.0"
+    "dotenv": "^16.3.1"
   }
 }