Add hint for modifiyng clicks

[ArminBu]

#5340 (comment)

Proposed changes

Add a hint to the documentation of keys.js about modifying clicks, as there is misleading information about it on StackOverflow (here and [here] (https://stackoverflow.com/questions/30077667/how-to-simulate-ctrl-click-or-shift-click-with-webdriver-io)) and people could save time, facing the same issue.

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

Checklist

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)
• I have added proper type definitions for new commands (if appropriate)

Further Comments

I will also comment on linked SO Questions, that v6 is different.

Reviewers: @webdriverio/project-committers

[jsf-clabot]

All committers have signed the CLA.

[christian-bromann]

👍

[christian-bromann]

Congratulations on your first WebdriverIO contribution! This project can't live without the participation of the community. We appreciate you 🙏 ❤️