chore: bump soketto from 0.6.0 to 0.7.0 (#20355)

Bumps [soketto](https://github.com/paritytech/soketto) from 0.6.0 to 0.7.0.
- [Release notes](https://github.com/paritytech/soketto/releases)
- [Changelog](https://github.com/paritytech/soketto/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/paritytech/soketto/compare/v0.6.0...v0.7.0)

---
updated-dependencies:
- dependency-name: soketto
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

rpc/Cargo.toml

@@ -28,7 +28,7 @@ regex = "1.5.4"
 serde = "1.0.130"
 serde_derive = "1.0.103"
 serde_json = "1.0.68"
-soketto = "0.6"
+soketto = "0.7"
 solana-account-decoder = { path = "../account-decoder", version = "=1.8.0" }
 solana-client = { path = "../client", version = "=1.8.0" }
 solana-entry = { path = "../entry", version = "=1.8.0" }