v1.6.0 wheels are built with version 1.5.4

I _think_ the version should've been bumped in `__init__.py` prior to releasing. As a result, the wheels on the release (for example) are built with the prior version number:

<img width="2506" height="1208" alt="Image" src="https://github.com/user-attachments/assets/83aa218a-71de-4089-923c-f9265fb73bd7" />