Fix rn-tester Animated example label color in dark mode (#44127)

Summary:
Fix rn-tester Animated example label color in dark mode

## Changelog:

[INTERNAL] [FIXED] - Fix rn-tester Animated example label color in dark mode

Pull Request resolved: https://github.com/facebook/react-native/pull/44127

Test Plan:
Animated examples render incorrectly in dark mode. So let's fix them. :)

![image](https://github.com/facebook/react-native/assets/5061845/ad882ee2-d156-4b24-8ddb-0ec27dc27cba)

Reviewed By: fabriziocucci

Differential Revision: D56234954

Pulled By: javache

fbshipit-source-id: 5fd8604077ced9aa3acd23a7dc9ebd8476a7330b