Update brew to avoid 403 on accessing https://homebrew.bintray.com
Update brew to avoid 403 on accessing https://homebrew.bintray.com

Compare https://github.com/Homebrew/brew/issues/11119 .

Signed-off-by: Miloslav Trmač <9c008e38982a5397deb855345fb164f0558459ae@redhat.com>

mtrmac/skopeo,mtrmac/skopeo,mtrmac/skopeo