Bump ws from 0.9.0 to 0.9.1

Bumps [ws](https://github.com/housleyjk/ws-rs) from 0.9.0 to 0.9.1.
- [Release notes](https://github.com/housleyjk/ws-rs/releases)
- [Changelog](https://github.com/housleyjk/ws-rs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/housleyjk/ws-rs/compare/v0.9.0...v0.9.1)

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

bench-exchange/Cargo.toml

@@ -36,4 +36,4 @@ solana-netutil = { path = "../netutil", version = "0.20.0" }
 solana-runtime = { path = "../runtime", version = "0.20.0" }
 solana-sdk = { path = "../sdk", version = "0.20.0" }
 untrusted = "0.7.0"
-ws = "0.9.0"
+ws = "0.9.1"