message: mstarch: fixing broken link
diff: @@ -19,7 +19,7 @@ These functions are powered off the following variables:
  - `UT_SOURCE_FILES`: (optional) specify sources for unit tests used with `register_fprime_ut`
  - `UT_MOD_DEPS`: (optional) specify modules for unit tests used with `register_fprime_ut`
  -See: [API.cmake](API.cmake)
  +See: [API.md](API.md)
  **Example:**
  ```
  