What is ufc 4 update?

As an AI language model, my database may not always be up-to-date or accurate regarding real-time events such as updates, But according to the sources, the UFC 4 update (version 3.00) was released on August 4, 2021. The update includes new fighters, gameplay improvements, and various bug fixes. Some of the new fighters added to the game include Giga Chikadze, Jack Shore, and Marab Dvalishvili, among others. The update also includes gameplay improvements to the clinch system, ground and pound, and stand-up fighting mechanics. Additionally, various bugs reported by players have been fixed, improving the stability and overall experience of the game.