Fix Readme.md

Signed-off-by: kerthcet <kerthcet@gmail.com>

Author: kerthcet

README.md

@@ -35,7 +35,7 @@ Or add the following line to your Cargo.toml:
 
 ## How to Use
 
-Here's a simple example with the Weighted Round Robin (WRR) routing mode. Before running the code, make sure to set your provider API key in the environment variable by running `export <PROVIDER>_API_KEY="your_provider_api_key"`.
+Here's a simple example with the Weighted Round Robin (WRR) router mode. Before running the code, make sure to set your provider API key in the environment variable by running `export <PROVIDER>_API_KEY="your_openai_api_key"`.
 Here we use OpenAI as an example.
 
 
@@ -49,7 +49,7 @@ use tokio::runtime::Runtime;
 fn main() {
     let config = client::Config::builder()
         .provider("openai")
-        .routing_mode(client::RouterMode::WRR)
+        .router_mode(client::RouterMode::WRR)
         .model(
             client::ModelConfig::builder()
                 .name("gpt-3.5-turbo")