Modify warning message (#28514)

Summary:
Modify deprecation warning message for `AccessibilityInfo.fetch`

- https://reactnative.dev/docs/accessibilityinfo#isscreenreaderenabled
- 523ab83338

## Changelog

[Internal] [Changed] - Modify deprecation warning message for `AccessibilityInfo.fetch`
Pull Request resolved: https://github.com/facebook/react-native/pull/28514

Test Plan: Try using `AccessibilityInfo.fetch` and check log

Reviewed By: cpojer

Differential Revision: D20850223

Pulled By: TheSavior

fbshipit-source-id: e21bb20b7a02d9f2ed6e27e2bfecbac0aebf9e09

Libraries/Components/AccessibilityInfo/AccessibilityInfo.android.js

@@ -93,7 +93,7 @@ const AccessibilityInfo = {
    */
   get fetch(): () => Promise<boolean> {
     console.warn(
-      'AccessibilityInfo.fetch is deprecated, call Accessibility.isScreenReaderEnabled instead',
+      'AccessibilityInfo.fetch is deprecated, call AccessibilityInfo.isScreenReaderEnabled instead',
     );
     return this.isScreenReaderEnabled;
   },

Libraries/Components/AccessibilityInfo/AccessibilityInfo.ios.js

@@ -167,7 +167,7 @@ const AccessibilityInfo = {
    */
   get fetch(): $FlowFixMe {
     console.warn(
-      'AccessibilityInfo.fetch is deprecated, call Accessibility.isScreenReaderEnabled instead',
+      'AccessibilityInfo.fetch is deprecated, call AccessibilityInfo.isScreenReaderEnabled instead',
     );
     return this.isScreenReaderEnabled;
   },