deps(deps): bump @polkadot-api/substrate-bindings from 0.16.3 to 0.16.4 (#66)

Bumps [@polkadot-api/substrate-bindings](https://github.com/polkadot-api/polkadot-api) from 0.16.3 to 0.16.4.
- [Release notes](https://github.com/polkadot-api/polkadot-api/releases)
- [Changelog](https://github.com/polkadot-api/polkadot-api/blob/main/NEWS.md)
- [Commits](https://github.com/polkadot-api/polkadot-api/commits)

---
updated-dependencies:
- dependency-name: "@polkadot-api/substrate-bindings"
  dependency-version: 0.16.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package-lock.json

@@ -27,7 +27,7 @@
     "@polkadot-api/descriptors": "file:.papi/descriptors",
     "@polkadot-api/known-chains": "^0.9.12",
     "@polkadot-api/signer": "^0.2.2",
-    "@polkadot-api/substrate-bindings": "^0.16.3",
+    "@polkadot-api/substrate-bindings": "^0.16.4",
     "@polkadot-api/substrate-client": "^0.4.4",
     "@polkadot/util": "^13.5.6",
     "@polkadot/util-crypto": "^13.5.5",