Fix typo in FAQ answer text

Author: Stacyrch140

articles/ai-services/openai/faq.yml

@@ -115,7 +115,7 @@ sections:
           We noticed charges associated with API calls that failed to complete with status code 400. Why are failed API calls generating a charge? 
         answer:
           If the service performs processing, you will be charged even if the status code is not successful (not 200).
-          Common examples of this are, a 400 error due to a content filter or input limit, or a 408 error due to a timeout. Charges will also occur when a `status 200` is received with a `finish_reason` of `content_filter`.
+          Common examples of this are, a 400 error due to a content filter or input limit, or a 408 error due to a time-out. Charges will also occur when a `status 200` is received with a `finish_reason` of `content_filter`.
           In this case the prompt did not have any issues, but the completion generated by the model was detected to violate the content filtering rules, which result in the completion being filtered. 
 
           If the service doesn't perform processing, you won't be charged.