[nostalgia/core] Rename event handler to update handler

src/nostalgia/studio/main.cpp

@@ -33,7 +33,7 @@ static int eventHandler(core::Context *ctx) noexcept {
 static ox::Error run(ox::UniquePtr<ox::FileSystem> fs) noexcept {
 	oxRequireM(ctx, core::init(std::move(fs), "NostalgiaStudio"));
 	core::setWindowTitle(ctx.get(), "Nostalgia Studio");
-	core::setEventHandler(ctx.get(), eventHandler);
+	core::setUpdateHandler(ctx.get(), eventHandler);
 	core::setConstantRefresh(ctx.get(), false);
 	studio::StudioContext studioCtx;
 	core::setApplicationData(ctx.get(), &studioCtx);