Replace ls | cut with basename -a

[kenodegard]

Description

The windows runs of the canary-release workflow keeps getting the following error:

Uploaded the following files:
/usr/bin/cut: -: Broken pipe
Error: Process completed with exit code 1.

No idea why since this worked previously 🤷🏼‍♂️. This is an attempt to fix the issue by using standard GNU basename features. See https://superuser.com/a/1178917 for more.