Update Readme with newer checkpoint epoch 18

README.md

@@ -134,7 +134,7 @@ def chunked_wer(targets, predictions, chunk_size=None):
 print("WER: {:2f}".format(100 * chunked_wer(result["sentence"], result["pred_strings"], chunk_size=4000)))
 ```
 
-**Test Result**: 9.31 %  
+**Test Result**: 8.93 %  
 
 ## Training