Update languages-reference.md

Author: rmca14

articles/cognitive-services/translator-speech/languages-reference.md

@@ -19,7 +19,7 @@ Microsoft Translator continually extends the list of languages supported by its
 
 Code samples demonstrating use of the API to get available languages are available from the [Microsoft Translator Github site](https://github.com/MicrosoftTranslator).
 
-## Implementation Notes
+## Implementation notes
 
 GET /languages 
 
@@ -149,4 +149,4 @@ X-RequestId|Value generated by server to identify the request and used for troub
 |400|Bad request. Check input parameters to ensure they are valid. The response object includes a more detailed description of the error.|
 |429|Too many requests.|
 |500|An error occured. If the error persists, please report it with client trace identifier (X-ClientTraceId) or request identifier (X-RequestId).|
-|503|Server temporarily unavailable. Please retry the request. If the error persists, please report it with client trace identifier (X-ClientTraceId) or request identifier (X-RequestId).|
+|503|Server temporarily unavailable. Please retry the request. If the error persists, please report it with client trace identifier (X-ClientTraceId) or request identifier (X-RequestId).|