chore(deps)(deps): bump ethers in the blockchain group (#15)

Bumps the blockchain group with 1 update: [ethers](https://github.com/ethers-io/ethers.js).


Updates `ethers` from 6.15.0 to 6.16.0
- [Release notes](https://github.com/ethers-io/ethers.js/releases)
- [Changelog](https://github.com/ethers-io/ethers.js/blob/main/CHANGELOG.md)
- [Commits](ethers-io/ethers.js@v6.15.0...v6.16.0)

---
updated-dependencies:
- dependency-name: ethers
  dependency-version: 6.16.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: blockchain
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package.json

@@ -47,7 +47,7 @@
     "@safe-global/types-kit": "^3.0.0",
     "@solana/web3.js": "^1.98.4",
     "commander": "^14.0.2",
-    "ethers": "^6.15.0",
+    "ethers": "^6.16.0",
     "prettier": "^3.7.4",
     "winston": "^3.19.0",
     "zod": "^4.1.13"