chrome UA in example usage

Author: cyber01

README.md

@@ -184,7 +184,7 @@ UserAgent for connection (Default is Mozilla/5.0 (Windows NT 10.0; Win64; x64; r
 
 Example:
 
-    wayback_machine_downloader http://example.com --user-agent "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:80.0) Gecko/20100101 Firefox/80.0"
+    wayback_machine_downloader http://example.com --user-agent "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36"
 
 ## Using the Docker image