First you should use git submodule update --remote to update the LVGL
related submodules to the latest.
Then you should open LVGL.MaintainerTools.sln and run LvglProjectFileUpdater
project to synchronize the files from the current LVGL related submodules to
project files.
Finally you should open LVGL.MaintainerTools.sln and run LvglModuleDefinitionGenerator
project to synchronize LvglWindows\LvglWindows.def.