Bump k256 from 0.13.3 to 0.13.4

Bumps [k256](https://github.com/RustCrypto/elliptic-curves) from 0.13.3 to 0.13.4.
- [Commits](RustCrypto/elliptic-curves@k256/v0.13.3...k256/v0.13.4)

---
updated-dependencies:
- dependency-name: k256
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Cargo.toml

@@ -817,7 +817,7 @@ jobserver = { version = "0.1.26" }
 jsonpath_lib = { version = "0.3" }
 jsonrpsee = { version = "0.24.3" }
 jsonrpsee-core = { version = "0.24.3" }
-k256 = { version = "0.13.3", default-features = false }
+k256 = { version = "0.13.4", default-features = false }
 kitchensink-runtime = { path = "substrate/bin/node/runtime" }
 kvdb = { version = "0.13.0" }
 kvdb-memorydb = { version = "0.13.0" }