Fix clicking formatted link

[aldinezi]

Please describe your changes

• Adds a check whether clicked event target is a child of an anchor tag. Fixes [Bug]: clicking on a link that is a formatted text will not open the link #4425
• Added a Bold extension and one bold link in link extension preview.

How did you accomplish your changes

I have added a check using closest on event target.

How have you tested your changes

Tested locally

How can we verify your changes

You can verify this by changing openOnClick in link extension config, and then by clicking on a link within bold text.

Remarks

Checklist

• The changes are not breaking the editor
• Added tests where possible
• Followed the guidelines
• Fixed linting issues

Related issues

#4425

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[janthurau]

Thanks! I've recently merged another PR (#4423) that fixed the same issue, so closing this 🤓