Encode to UTF-8

Author: Steven Anton

src/sagemaker/local/local_session.py

@@ -469,7 +469,7 @@ def invoke_endpoint(
         if InferenceId is not None:
             headers["X-Amzn-SageMaker-Inference-Id"] = InferenceId
 
-        r = self.http.request("POST", url, body=Body, preload_content=False, headers=headers)
+        r = self.http.request("POST", url, body=Body.encode("utf-8"), preload_content=False, headers=headers)
 
         return {"Body": r, "ContentType": Accept}