GH-75017
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Validate extension JSON: Error: Hash changed for 'classes/RichTextLabel/methods/push_list', from 8593DF77 to F0951C19. This means that the function has changed and no compatibility function was provided.
Validate extension JSON: Error: Field 'classes/RichTextLabel/methods/push_list/arguments': size changed value in new API, from 3 to 4.

Added an optional parameter with a default value. No adjustments should be necessary.
