[🚀 Feature]: improve contributing to documentation example code section

[pallavigitwork]

Feature and motivation

Current is -https://www.selenium.dev/documentation/about/contributing/
we can add it in here, that those contributing example code, should use website from selenium repository found here. so that we can ensure that the example code going in documentation always work as they use demo websites which are used by selenium also for testing.
https://www.selenium.dev/selenium/web/

[github-actions]

@pallavigitwork, thank you for creating this issue. We will troubleshoot it as soon as we can.

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[pallavigitwork]

#2492 provides fix for the english version of the document. for other translations help is required.