Missing stub for bpy.types.GeometrySet

[UnknownLITE]

GeometrySet was introduced in 4.5
Tested for version 4.5 and 5.0 of 20260128 (latest as of writing)
Doc:

• https://docs.blender.org/api/5.0/bpy.types.GeometrySet.html
• https://docs.blender.org/api/4.5/bpy.types.GeometrySet.html

[nutti]

Raised PR to the Blender repository.
https://projects.blender.org/blender/blender/pulls/156476