[librsvg-oci-images] ci: use buildah to push the images as well

[Jordan Petridis <jpetridis src gnome org>]

commit 71a6ec2f9c70d295828f4ff9b5da4fd015b0e348
Author: Jordan Petridis <jpetridis gnome org>
Date:   Fri Jun 5 15:03:51 2020 +0300

    ci: use buildah to push the images as well

 .gitlab-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 66e5780..184ee10 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -25,7 +25,7 @@ variables:
     - buildah bud -f ${DOCKERFILE} -t ${IMAGE}
     - |
       if [ "$CI_COMMIT_REF_NAME" = "master" ]; then
-          podman push ${IMAGE}
+          buildah push ${IMAGE}
       else
           echo "Not pushing image, as we are on non-master branch $CI_COMMIT_REF_NAME"
       fi