Update the ReadMe

Author: mdmintz

README.md

@@ -71,7 +71,7 @@
 ```python
 from seleniumbase import SB
 
-with SB(test=True) as sb:
+with SB(test=True, uc=True) as sb:
     sb.open("https://google.com/ncr")
     sb.type('[title="Search"]', "SeleniumBase GitHub page\n")
     sb.click('[href*="github.com/seleniumbase/"]')