Fix a typo in the Array class documentation
Fix a typo in the Array class documentation

This closes https://github.com/godotengine/godot-docs/issues/4049.

(cherry picked from commit 603eddce861a36fd615f947223a6b36a838bdfe0)

ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot