Add dependency change to CHANGELOG

* Note that nvgpu has been replaced with nvidia-ml-py.

Author: matthewfeickert

CHANGELOG.md

@@ -11,6 +11,7 @@ v0.17.0
 
 New Features
 
+- Modernizes dependencies to use [``nvidia-ml-py``](https://pypi.org/project/nvidia-ml-py/) in place of [``nvgpu``](https://github.com/rossumai/nvgpu).
 - [Significantly improves convergence of inverse stream maps](https://github.com/PlasmaControl/DESC/pull/1919).
     - Method to plot frequency spectrum of inverse stream map in field line coordinates ``Bounce2D.plot_angle_spectrum``.
 - Method to compute bounce integrals in batches is now added to the public API ``Bounce2D.batch``.