chore(test): Update to rand 0.9 (#2236)

Author: tottoto

tests/default_stubs/Cargo.toml

@@ -8,7 +8,7 @@ name = "default_stubs"
 tokio = {version = "1.0", features = ["macros", "rt-multi-thread", "net"]}
 tokio-stream = {version = "0.1", features = ["net"]}
 prost = "0.13"
-rand = "0.8"
+rand = "0.9"
 tonic = {path = "../../tonic"}
 
 [build-dependencies]

tests/default_stubs/src/test_defaults.rs

@@ -139,9 +139,9 @@ async fn run_services_in_background_uds() -> (String, String) {
     let svc = test_server::TestServer::new(Svc {});
     let svc_default_stubs = test_default_server::TestDefaultServer::new(Svc {});
 
-    let mut rng = rand::thread_rng();
+    let mut rng = rand::rng();
     let suffix: String = (0..8)
-        .map(|_| rng.sample(rand::distributions::Alphanumeric) as char)
+        .map(|_| rng.sample(rand::distr::Alphanumeric) as char)
         .collect();
     let tmpdir = fs::canonicalize(env::temp_dir())
         .unwrap()