Hey swamp192,
No worries at all! It's a good question. If you can't see the mouse cursor to click on the update link, try pressing T
to open the chat. Once the chat is open, you should be able to see your cursor and click on the link.
However, the link won't automatically install the update, It'll just take you to the official website where you can download the new .jar file. One you have that file, place it in your mods folder and remove the old one.
Regarding the update notification, there isn't a built-in method to disable it. I understand it can be a bit intrusive, but it serves as an important reminder when there's a newer version available with improvements or security updates.
I hope this clears up any confusion. If you have any further questions or run into issues updating, feel free to reach out.