Hi Zakaria!
I just helped another user with this same issue just a bit ago on this post here and I bet you are running into the same issue.
To update your name on an Academy Certification, you need to ensure your name change takes place within your HubSpot User Profile. If you only updated your Academy Profile name, that will not update the certifications (seems counterintuitive, I know)
Go ahead and update your name within your HubSpot Profile, your Academy Profile, and your Community profile just to make sure all bases are covered, then if your name still does not update after a few minutes you may need to reach out to Support directly, but that should do the trick!
Let me know if that works for you if you want to chat more!