chore(deps): update russh requirement from 0.55.0 to 0.56.0

Updates the requirements on [russh](https://github.com/warp-tech/russh) to permit the latest version.
- [Release notes](https://github.com/warp-tech/russh/releases)
- [Commits](Eugeny/russh@v0.55.0...v0.56.0)

---
updated-dependencies:
- dependency-name: russh
  dependency-version: 0.56.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

testcontainers/Cargo.toml

@@ -30,7 +30,7 @@ log = "0.4"
 memchr = "2.7.2"
 parse-display = "0.9.0"
 pin-project-lite = "0.2.14"
-russh = { version = "0.55.0", default-features = false, optional = true }
+russh = { version = "0.56.0", default-features = false, optional = true }
 reqwest = { version = "0.12.5", features = [
     "json",
     "charset",