set language how the api wants it

src/main.rs

@@ -127,7 +127,7 @@ async fn transcribe_call(file_path: &Path) -> Result<CreateTranscriptionResponse
     };
     let request = CreateTranscriptionRequestArgs::default()
         .prompt("This is a public safety radio transmission. The speakers could be any of the following communicating between each other: dispatcher, law enforcement officer, fire fighter, or emergency medical services")
-        .language("English")
+        .language("en")
         .response_format(AudioResponseFormat::Text)
         .model("whisper-1")
         .file(audio_input)