chore(examples): Update to rand 0.9 (#2168)

Author: tottoto

examples/Cargo.toml

@@ -285,7 +285,7 @@ async-stream = { version = "0.3", optional = true }
 tokio-stream = { version = "0.1", optional = true }
 tokio-util = { version = "0.7.8", optional = true }
 tower = { version = "0.5", optional = true }
-rand = { version = "0.8", optional = true }
+rand = { version = "0.9", optional = true }
 serde = { version = "1.0", features = ["derive"], optional = true }
 serde_json = { version = "1.0", optional = true }
 tracing = { version = "0.1.16", optional = true }

examples/routeguide-tutorial.md

@@ -693,8 +693,8 @@ use rand::Rng;
 
 ```rust
 async fn run_record_route(client: &mut RouteGuideClient<Channel>) -> Result<(), Box<dyn Error>> {
-    let mut rng = rand::thread_rng();
-    let point_count: i32 = rng.gen_range(2..100);
+    let mut rng = rand::rng();
+    let point_count: i32 = rng.random_range(2..100);
 
     let mut points = vec![];
     for _ in 0..=point_count {
@@ -715,8 +715,8 @@ async fn run_record_route(client: &mut RouteGuideClient<Channel>) -> Result<(),
 
 ```rust
 fn random_point(rng: &mut ThreadRng) -> Point {
-    let latitude = (rng.gen_range(0..180) - 90) * 10_000_000;
-    let longitude = (rng.gen_range(0..360) - 180) * 10_000_000;
+    let latitude = (rng.random_range(0..180) - 90) * 10_000_000;
+    let longitude = (rng.random_range(0..360) - 180) * 10_000_000;
     Point {
         latitude,
         longitude,

examples/src/routeguide/client.rs

@@ -39,8 +39,8 @@ async fn print_features(client: &mut RouteGuideClient<Channel>) -> Result<(), Bo
 }
 
 async fn run_record_route(client: &mut RouteGuideClient<Channel>) -> Result<(), Box<dyn Error>> {
-    let mut rng = rand::thread_rng();
-    let point_count: i32 = rng.gen_range(2..100);
+    let mut rng = rand::rng();
+    let point_count: i32 = rng.random_range(2..100);
 
     let mut points = vec![];
     for _ in 0..=point_count {
@@ -115,8 +115,8 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
 }
 
 fn random_point(rng: &mut ThreadRng) -> Point {
-    let latitude = (rng.gen_range(0..180) - 90) * 10_000_000;
-    let longitude = (rng.gen_range(0..360) - 180) * 10_000_000;
+    let latitude = (rng.random_range(0..180) - 90) * 10_000_000;
+    let longitude = (rng.random_range(0..360) - 180) * 10_000_000;
     Point {
         latitude,
         longitude,