Make warning message more readable for bigger deployments

In cases, when gofalcon is part of greater integration, it may not be obvious
that the log message is coming out of gofalcon.

falcon/api_client.go

@@ -48,7 +48,7 @@ func (rt *roundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
 	req.Header.Add("User-Agent", userAgent)
 
 	if rt.LastRateLimitDigits == 1 || rt.LastRateLimitDigits == 2 {
-		log.Debug("Approaching API rate limits. Waiting 500 millisecond.")
+		log.Debug("Approaching CrowdStrike API rate limits. Waiting 500 millisecond.")
 		time.Sleep(500 * time.Millisecond)
 	}
 	response, err := rt.T.RoundTrip(req)