docs(readme): update docs for repeating usage (#2169)

README.md

@@ -640,14 +640,24 @@ const scope = nock('http://my.server.com:8081')
 
 You are able to specify the number of times to repeat the same response.
 
+**NOTE:** When request times is more than the number you specified, you will get an error before cleaning this interceptor.
+
 ```js
 nock('http://zombo.com').get('/').times(4).reply(200, 'Ok')
 
 http.get('http://zombo.com/') // respond body "Ok"
 http.get('http://zombo.com/') // respond body "Ok"
 http.get('http://zombo.com/') // respond body "Ok"
 http.get('http://zombo.com/') // respond body "Ok"
-http.get('http://zombo.com/') // respond with zombo.com result
+
+// This code will get an error with message:
+// Nock: No match for request
+http.get('http://zombo.com/')
+
+// clean your interceptor
+nock.cleanAll()
+
+http.get('http://zombo.com/') // real respond with zombo.com result
 ```
 
 Sugar syntax