fix typo in success key in EndpointHandler response

handler.py

@@ -103,7 +103,7 @@ class EndpointHandler:
                 encoded_audio = base64.b64encode(buffer.read()).decode("utf-8")
 
             return {
-                "sucess": True,
+                "success": True,
                 "audio_base64": encoded_audio
                 }