Godoc update for #436

Author: jeevatkm

request.go

@@ -599,6 +599,8 @@ func (r *Request) SetCookies(rs []*http.Cookie) *Request {
 // The request will retry if any of the functions return true and error is nil.
 //
 // Note: These retry conditions are checked before all retry conditions of the client.
+//
+// Since v2.7.0
 func (r *Request) AddRetryCondition(condition RetryConditionFunc) *Request {
 	r.retryConditions = append(r.retryConditions, condition)
 	return r