doc: Mention iOS support for Input gravity/gyroscope sensors

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

doc/classes/Input.xml

@@ -49,7 +49,7 @@
 			<return type="Vector3">
 			</return>
 			<description>
-				Returns the acceleration of the device's accelerometer, if the device has one. Otherwise, the method returns [constant Vector3.ZERO].
+				Returns the acceleration of the device's accelerometer sensor, if the device has one. Otherwise, the method returns [constant Vector3.ZERO].
 				Note this method returns an empty [Vector3] when running from the editor even when your device has an accelerometer. You must export your project to a supported device to read values from the accelerometer.
 				[b]Note:[/b] This method only works on iOS, Android, and UWP. On other platforms, it always returns [constant Vector3.ZERO].
 			</description>
@@ -102,16 +102,16 @@
 			<return type="Vector3">
 			</return>
 			<description>
-				Returns the gravity of the device's accelerometer, if the device has one. Otherwise, the method returns [constant Vector3.ZERO].
+				Returns the gravity of the device's accelerometer sensor, if the device has one. Otherwise, the method returns [constant Vector3.ZERO].
 				[b]Note:[/b] This method only works on Android and iOS. On other platforms, it always returns [constant Vector3.ZERO].
 			</description>
 		</method>
 		<method name="get_gyroscope" qualifiers="const">
 			<return type="Vector3">
 			</return>
 			<description>
-				Returns the rotation rate in rad/s around a device's X, Y, and Z axes of the gyroscope, if the device has one. Otherwise, the method returns [constant Vector3.ZERO].
-				[b]Note:[/b] This method only works on Android. On other platforms, it always returns [constant Vector3.ZERO].
+				Returns the rotation rate in rad/s around a device's X, Y, and Z axes of the gyroscope sensor, if the device has one. Otherwise, the method returns [constant Vector3.ZERO].
+				[b]Note:[/b] This method only works on Android and iOS. On other platforms, it always returns [constant Vector3.ZERO].
 			</description>
 		</method>
 		<method name="get_joy_axis" qualifiers="const">
@@ -172,8 +172,8 @@
 			<return type="Vector3">
 			</return>
 			<description>
-				Returns the the magnetic field strength in micro-Tesla for all axes of the device's magnetometer, if the device has one. Otherwise, the method returns [constant Vector3.ZERO].
-				[b]Note:[/b] This method only works on Android and UWP. On other platforms, it always returns [constant Vector3.ZERO].
+				Returns the the magnetic field strength in micro-Tesla for all axes of the device's magnetometer sensor, if the device has one. Otherwise, the method returns [constant Vector3.ZERO].
+				[b]Note:[/b] This method only works on Android, iOS and UWP. On other platforms, it always returns [constant Vector3.ZERO].
 			</description>
 		</method>
 		<method name="get_mouse_button_mask" qualifiers="const">
@@ -403,7 +403,7 @@
 			</argument>
 			<description>
 				Vibrate Android and iOS devices.
-				[b]Note:[/b] It needs VIBRATE permission for Android at export settings. iOS does not support duration.
+				[b]Note:[/b] It needs [code]VIBRATE[/code] permission for Android at export settings. iOS does not support duration.
 			</description>
 		</method>
 		<method name="warp_mouse_position">