bpo-40548: Github Actions: update actions/checkout to v2 (GH-20164)


Signed-off-by: Filipe Laíns <lains@archlinux.org>
(cherry picked from commit c444108dd62672f2b41539bcc8f15da44501f405)

Co-authored-by: Filipe Laíns <lains@archlinux.org>
1 file changed