chore: update examples

examples/embedding.rs

@@ -2,15 +2,14 @@ use openai_api_rs::v1::api::Client;
 use openai_api_rs::v1::embedding::EmbeddingRequest;
 use std::env;
 
-#[tokio::main]
-async fn main() -> Result<(), Box<dyn std::error::Error>> {
+fn main() -> Result<(), Box<dyn std::error::Error>> {
     let client = Client::new(env::var("OPENAI_API_KEY").unwrap().to_string());
     let req = EmbeddingRequest {
         model: "text-embedding-ada-002".to_string(),
         input: "story time".to_string(),
         user: Option::None,
     };
-    let result = client.embedding(req).await?;
+    let result = client.embedding(req)?;
     println!("{:?}", result.data);
 
     Ok(())