Update 'SDL_video.h' implementation.

Author: Aermoss

sdl3/SDL_video.py

@@ -174,6 +174,7 @@ class SDL_GLContextState(ctypes.c_void_p):
 
 SDL_PROP_WINDOW_CREATE_ALWAYS_ON_TOP_BOOLEAN: bytes = "SDL.window.create.always_on_top".encode()
 SDL_PROP_WINDOW_CREATE_BORDERLESS_BOOLEAN: bytes = "SDL.window.create.borderless".encode()
+SDL_PROP_WINDOW_CREATE_CONSTRAIN_POPUP_BOOLEAN: bytes = "SDL.window.create.constrain_popup".encode()
 SDL_PROP_WINDOW_CREATE_FOCUSABLE_BOOLEAN: bytes = "SDL.window.create.focusable".encode()
 SDL_PROP_WINDOW_CREATE_EXTERNAL_GRAPHICS_CONTEXT_BOOLEAN: bytes = "SDL.window.create.external_graphics_context".encode()
 SDL_PROP_WINDOW_CREATE_FLAGS_NUMBER: bytes = "SDL.window.create.flags".encode()