I'm not sure what you're asking. If you want the game to auto-update for players, it does that if they use the Itch app. Works even better if you use Butler.
I am a beginner games developer, I developed a game with Unity engine, and I had uploaded the game on itch.io platform several days ago, I discovered few bugs in the game, so I enhanced the game a bit on Unity engine, and now I want to update the game with the updates I made in the game on the uploaded itch.io, but I don't know how to update the game in itch.io, can you help me please
Regards