Difficulty Updating WordPress Version

Hello,

I’m looking for help updating the WordPress version.

It’s currently on 5.7.6, though I know there are newer versions. When I go into Tools -> Site Health, it says “We were unable to check if any new versions of WordPress are available. Check for updates manually.”

When I click on “Check for updates manually,” it takes me to “Word Press Updates” and says, “Current version: 5.7.6 Last checked on April 19, 2022 at 11:14 am. Check again.”

When I click “check again,” it simply refreshes page.

How do I update Word Press now ?

Thanks in advance.

The page I need help with: [log in to see the link]