homebrew_cask: fix upgrade_all changed when nothing upgraded (#8708) * homebrew_cask: fix upgrade_all changed when nothing upgraded * Add changelog fragment * Update changelogs/fragments/8708-homebrew_cask-fix-upgrade-all.yml Co-authored-by: Felix Fontein <felix@fontein.de> * Add .strip() to upgrade output check Co-authored-by: Felix Fontein <felix@fontein.de> --------- Co-authored-by: John Byrne <john@jobytech.net> Co-authored-by: Felix Fontein <felix@fontein.de> (cherry picked from commit 76d0222a83) Co-authored-by: John Byrne <6145795+johnbyrneio@users.noreply.github.com>
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