Update failed for the latest version

When I try to update to the latest version I get the following error. I tried increasing the execution time limit, but still not updating to the latest version

Error: “Update Failed: Connection Timed Out Connection Timed Out”

Hi, we haven’t received any other reports of this. Have you been able to update yet?

Tried several time, but still could not succeed in updating…

You can update manually instead. Download this file: https://github.com/pressbooks/pressbooks/releases/download/5.5.1/pressbooks-5.5.1.zip

Unzip it, and replace the pressbooks folder in /plugins/ on your server.

Thank you @ned, will try that…