Update CHANGELOG.md

Small linguistic change to Sphere Mask.

com.unity.shadergraph/CHANGELOG.md

 
 ![](.data/sphereMask.png)
 
-With this node, you can create a sphere mask. Indicate the starting coordinate and center point, and the sphere mask will use these with the **Radius** and **Hardness** parameters. Sphere mask functionality works in both 2D and 3D spaces, and is based on the vector coordinates in the **Coords and Center** input.
+With this node, you can create a sphere mask. Indicate the starting coordinate and center point. The sphere mask uses these with the **Radius** and **Hardness** parameters. Sphere mask functionality works in both 2D and 3D spaces, and is based on the vector coordinates in the **Coords and Center** input.
 
 ### Texture3D and Texture2D Array