The GODOT_REF and VSK_GAME_BRANCH environment variables have been upd…

…ated in the build.yml workflow files.

This change affects multiple projects, ensuring they're built against the latest versions. Additionally, a new test case has been added to test_improv.gd for better coverage.

.github/workflows/builds.yml

@@ -10,7 +10,7 @@ on:
 
 env:
   GAME_NAME: model_explorer_
-  GODOT_REF: groups-4.3.2024-06-19T122756Z
+  GODOT_REF: groups-4.3.2024-06-26T122053Z
   GODOT_REPOSITORY: v-sekai/godot
   SCONSFLAGS: verbose=yes warnings=extra werror=no module_text_server_fb_enabled=yes use_thinlto=yes
   DOTNET_NOLOGO: true