Add release note about iOS support.

Author: freakboy3742

docs/releasenotes/11.3.0.rst

@@ -80,11 +80,17 @@ Pillow only supports libavif 1.0.0 or later. In order to prevent errors when bui
 from source, if a user happens to have an earlier libavif on their system, Pillow will
 now ignore it.
 
+iOS wheels
+^^^^^^^^^^
+
+Pillow now provides wheels that can be used on iOS ARM64 devices, and on the iOS
+simulator on ARM64 and x86_64.
+
 AVIF support in wheels
 ^^^^^^^^^^^^^^^^^^^^^^
 
 Support for reading and writing AVIF images is now included in Pillow's wheels, except
-for Windows ARM64. libaom is available as an encoder and dav1d as a decoder.
+for Windows ARM64 and iOS. libaom is available as an encoder and dav1d as a decoder.
 
 Python 3.14 beta
 ^^^^^^^^^^^^^^^^