[CLN] Rename variable for clarity in test_gempy_subsurface.py

Author: Leguark

test/test_modules/test_gempy_subsurface.py

@@ -37,7 +37,8 @@ def test_gempy_to_subsurface():
     concatenated_id_array = np.concatenate(vertex_id_array)
     concatenated_cell_id_array = np.concatenate(cell_id_array)
 
-    ss = optional_dependencies.require_subsurface()
+    subsurface = optional_dependencies.require_subsurface()
+    ss = subsurface
     meshes: ss.UnstructuredData = ss.UnstructuredData.from_array(
         vertex=np.concatenate(vertex),
         cells=np.concatenate(simplex_list),