chore(deps): bump @metamask/keyring-api from 3.0.0 to 8.1.0

Bumps [@metamask/keyring-api](https://github.com/MetaMask/keyring-api) from 3.0.0 to 8.1.0.
- [Release notes](https://github.com/MetaMask/keyring-api/releases)
- [Changelog](https://github.com/MetaMask/keyring-api/blob/main/CHANGELOG.md)
- [Commits](MetaMask/keyring-api@v3.0.0...v8.1.0)

---
updated-dependencies:
- dependency-name: "@metamask/keyring-api"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

package.json

@@ -48,7 +48,7 @@
     "@metamask/eth-hd-keyring": "^7.0.1",
     "@metamask/eth-sig-util": "^7.0.0",
     "@metamask/eth-simple-keyring": "^6.0.1",
-    "@metamask/keyring-api": "^3.0.0",
+    "@metamask/keyring-api": "^8.1.0",
     "@metamask/obs-store": "^9.0.0",
     "@metamask/utils": "^8.2.0"
   },