Improve text in popup warning, remove "upgrade or downgrade" text

(cherry picked from commit 95ccbdea4b872ea0424e9815ced22b35dd88023d)

editor/project_manager.cpp

@@ -2313,7 +2313,7 @@ void ProjectManager::_open_selected_projects_ask() {
 				unsupported_features.remove_at(i);
 				i--;
 			} else if (_project_feature_looks_like_version(feature)) {
-				warning_message += vformat(TTR("Warning: This project was built in Godot %s.\nOpening will upgrade or downgrade the project to Godot %s.\n\n"), Variant(feature), Variant(VERSION_BRANCH));
+				warning_message += vformat(TTR("Warning: This project was last edited in Godot %s. Opening will change it to Godot %s.\n\n"), Variant(feature), Variant(VERSION_BRANCH));
 				unsupported_features.remove_at(i);
 				i--;
 			}