[5.2] Fix reCAPTCHA Invisble error getElementsByClassName().forEach is not a function

[Fedik]

Pull Request for Issue #44294.

Summary of Changes

Fix getElementsByClassName().forEach is not a function for reCAPTCHA Invisble.
Caused by #42797

Testing Instructions

Install Joomla 4, activate reCAPTCHA Invisble somewhere.
Update to Joomla 5.

Or, code review, HTMLCollection result of getElementsByClassName() does not have forEach() menthod.

Actual result BEFORE applying this Pull Request

reCAPTCHA Invisble broken

Expected result AFTER applying this Pull Request

reCAPTCHA Invisble works

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

[Quy]

I have tested this item ✅ successfully on dfc56ea

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