doc: Mention iOS support for Input gravity/gyroscope sensors
doc: Mention iOS support for Input gravity/gyroscope sensors

It has been implemented for iOS a long time ago already with #7127.

(cherry picked from commit 2d0fda3ca2301f24ba48776cea0338f5ac8e55bd)

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