docs(image): adding correct type spec for only ios props

Author: mateoguzmana

packages/react-native/Libraries/Image/ImageSource.d.ts

@@ -51,7 +51,7 @@ export interface ImageURISource {
    * to a URL load request, no attempt is made to load the data from the originating source,
    * and the load is considered to have failed.
    *
-   * @platform ios
+   * @platform ios (for `force-cache` and `only-if-cached`)
    */
   cache?: 'default' | 'reload' | 'force-cache' | 'only-if-cached' | undefined;
   /**

packages/react-native/Libraries/Image/ImageSource.js

@@ -66,7 +66,7 @@ export interface ImageURISource {
    * to a URL load request, no attempt is made to load the data from the originating source,
    * and the load is considered to have failed.
    *
-   * @platform ios
+   * @platform ios (for `force-cache` and `only-if-cached`)
    */
   +cache?: ?('default' | 'reload' | 'force-cache' | 'only-if-cached');
 

packages/rn-tester/js/examples/Image/ImageExample.js

@@ -1092,7 +1092,7 @@ exports.examples = [
   {
     title: 'Cache Policy',
     description: ('First image will be loaded and will be cached. ' +
-      'Second image is the same but will be reloaded if re-rendered' +
+      'Second image is the same but will be reloaded if re-rendered ' +
       'as the cache policy is set to reload.': string),
     render: function (): React.Node {
       return <CacheControlAndroidExample />;