build(deps): bump ethers from 5.7.2 to 6.6.2 in /creditcoin-js

Bumps [ethers](https://github.com/ethers-io/ethers.js) from 5.7.2 to 6.6.2.
- [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@v5.7.2...v6.6.2)

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

Signed-off-by: dependabot[bot] <support@github.com>

creditcoin-js/package.json

@@ -33,7 +33,7 @@
     },
     "dependencies": {
         "@polkadot/api": "9.14.2",
-        "ethers": "^5.7.1",
+        "ethers": "^6.6.2",
         "js-guid": "^1.0.0"
     }
 }