Update russh monorepo

Author: oxide-renovate[bot]

Cargo.lock

@@ -24,8 +24,8 @@ omicron-uuid-kinds.workspace = true
 oxide-client.workspace = true
 rand.workspace = true
 reqwest = { workspace = true, features = ["cookies"] }
-russh = "0.45.0"
-russh-keys = "0.45.0"
+russh = "0.52.1"
+russh-keys = "0.49.2"
 serde.workspace = true
 serde_json.workspace = true
 sled-agent-types.workspace = true