use _MIN in settings,cpp

[ellensp]

Description

PR #28436 added

return MIN(MAX_SAVED_MESHES, (meshes_end - meshes_start_index()) / MESH_STORE_SIZE);

To Marlin/src/module/settings.cpp. But MIN is not a standard macro

It errors with

Marlin/src/module/settings.cpp: In static member function 'static uint16_t MarlinSettings::calc_num_meshes()':
Marlin/src/module/settings.cpp:3193:14: error: 'MIN' was not declared in this scope
       return MIN(MAX_SAVED_MESHES, (meshes_end - meshes_start_index()) / MESH_STORE_SIZE);

This PR converts it to use _MIN

Benefits

No longer errors

Configurations

Stock with the following added
AUTO_BED_LEVELING_UBL
EEPROM_SETTINGS