Error correction for description

code/API_definitions/number-recycling.yaml

@@ -58,7 +58,7 @@ info:
 
 This approach simplifies API usage for API consumers using a three-legged access token to invoke the API by relying on the information that is associated with the access token and was identified during the authentication process.
 
-    ### Error handling:
+    ### Error handling
 
     - If the subject cannot be identified from the access token and the optional `phoneNumber` field is not included in the request, then the server will return an error with the `422 MISSING_PHONE_NUMBER` error code.
     - If the subject can be identified from the access token and the optional `phoneNumber` field is also included in the request, then the server will return an error with the `422 UNNECESSARY_PHONE_NUMBER` error code. This will the case even if the same phone number is identified by these two methods, as the server is unable to make this comparison.