[5.3] Fix typo in replacement event name for onUserBeforeDataValidation

[Fedik]

Pull Request for Issue #45294

Summary of Changes

Fixing a typo in replacement event name for onUserBeforeDataValidation.

Testing Instructions

Code review

Link to documentations

Please select:

• Documentation link for docs.joomla.org:
• No documentation changes for docs.joomla.org needed
• Pull Request link for manual.joomla.org:
• No documentation changes for manual.joomla.org needed

[brianteeman]

I have tested this item ✅ successfully on 9a451e9

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/45296.}

[QuyTon]

I have tested this item ✅ successfully on 9a451e9

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/45296.}

[QuyTon]

RTC

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/45296.}

[laoneo]

Thanks!