Jean-Christophe Fillion-Robin bf8b0b5925 ci: Remove invalid "required" keyword associated with actions/download-artifact
This commit fixes the following error introduced by adb85d69c (ci: Make
cache download optional):

  Unexpected input(s) 'required', valid inputs are ['name', 'path']
2022-07-06 22:51:46 -04:00
..
2022-04-09 00:33:55 +02:00