chore(deps): bump @polkadot/keyring from 12.1.1 to 12.1.2 in /javascript

Bumps [@polkadot/keyring](https://github.com/polkadot-js/common/tree/HEAD/packages/keyring) from 12.1.1 to 12.1.2.
- [Release notes](https://github.com/polkadot-js/common/releases)
- [Changelog](https://github.com/polkadot-js/common/blob/master/CHANGELOG.md)
- [Commits](https://github.com/polkadot-js/common/commits/v12.1.2/packages/keyring)

---
updated-dependencies:
- dependency-name: "@polkadot/keyring"
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

javascript/packages/orchestrator/package.json

@@ -35,7 +35,7 @@
   },
   "dependencies": {
     "@polkadot/api": "^10.5.1",
-    "@polkadot/keyring": "^12.1.1",
+    "@polkadot/keyring": "^12.1.2",
     "@polkadot/util-crypto": "^12.1.1",
     "@zombienet/utils": "^0.0.19",
     "chai": "^4.3.7",