added information about web examples for english document

Author: pallavigitwork

website_and_docs/content/documentation/about/contributing.en.md

@@ -79,6 +79,9 @@ Make sure that if you add a test to the page that all the other line numbers in
 correct. Adding a test at the top of a page means updating every single reference in the documentation that has a line
 number for that file.
 
+Code examples may need a relevant website or web page to demonstrate the scenario. To ensure examples consistently work, 
+it is recommended to use the test web pages available at https://www.selenium.dev/selenium/web/.
+
 Finally, make sure that the tests pass in the CI.