fix(deps): update rust crate rand to 0.9

Author: renovate[bot]

tools/gen_keys/Cargo.toml

@@ -7,7 +7,7 @@ edition = "2021"
 lazy_static = "1"
 openssl = "0.10"
 ssh-key = { version = "0.6", features = ["encryption"] }
-rand = "0.8"
+rand = "0.9"
 
 [dependencies.rug]
 version = "1"