fix: update return type hint for get_all_material_groups function

Author: Brunner246

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "cwapi3d"
-version = "32.443.8"
+version = "32.443.9"
 authors = [{ name = "Cadwork", email = "it@cadwork.ca" }]
 requires-python = ">= 3.12"
 description = 'Python bindings for CwAPI3D'

src/material_controller/__init__.pyi

@@ -472,7 +472,7 @@ def get_short_name(material_id: MaterialId) -> str:
         The short name of the material.
     """
 
-def get_all_material_groups() -> list[MaterialId]:
+def get_all_material_groups() -> list[str]:
     """Retrieves a list of all material groups.
 
     Returns: