## Description

This PR fix the text color for the default action in a CupertiniContextMenu.
Previously the dynamic color was not resolved which leads to text being blacks when theme brightness was dark.

| Before | After |
|--------|--------|
| ![Capture d’écran 2024-03-04 à 14 58 45](https://github.com/flutter/flutter/assets/840911/6a06715d-b2b8-49e1-b6de-37c03b96b627) |  ![Capture d’écran 2024-03-04 à 15 00 27](https://github.com/flutter/flutter/assets/840911/ed7c71ec-96f2-46ca-a5f6-ba3890732e33) |

## Related Issue

Fixes https://github.com/flutter/flutter/issues/144492.

## Tests

Adds 1 test, updates 1.