Updated the $X() usage as it supports chromium (#2183)

Co-authored-by: Rico Sta. Cruz <[email protected]>

Author: codebymad

xpath.md

@@ -22,7 +22,7 @@ Test queries in the Xpath test bed:
 $x("//div")
 ```
 
-Works in Firefox and Chrome.
+Works in Firefox and Chromium browsers.
 
 ## Selectors