Fix default value for TextInput autoCapitalize

Summary:
Changelog: [internal]

According to React Native docs, the default value for `autoCapitalize` is `sentences`.
Fabric's TextInput default value does not align with this.

[Source](https://reactnative.dev/docs/textinput#autocapitalize)

Reviewed By: JoshuaGross

Differential Revision: D23344479

fbshipit-source-id: f9e6f2aa6e1fbba2b08cb4aff23b842e49fa8c21

ReactCommon/react/renderer/components/textinput/iostextinput/primitives.h

@@ -90,9 +90,10 @@ class TextInputTraits final {
 
   /*
    * iOS & Android
-   * Default value: `None`.
+   * Default value: `Sentences`.
    */
-  AutocapitalizationType autocapitalizationType{AutocapitalizationType::None};
+  AutocapitalizationType autocapitalizationType{
+      AutocapitalizationType::Sentences};
 
   /*
    * Can be empty (`null` in JavaScript) which means `default`.