Fix registry dependency for container jobs (#1152)

diff --git a/zuul.d/container-images/ovn.yaml b/zuul.d/container-images/ovn.yaml
index 5a3e180..0c31387 100644
--- a/zuul.d/container-images/ovn.yaml
+++ b/zuul.d/container-images/ovn.yaml
@@ -27,6 +27,8 @@
     name: atmosphere-build-container-image-ovn
     parent: atmosphere-build-container-image
     dependencies:
+      - name: atmosphere-buildset-registry
+        soft: false
       - name: atmosphere-build-container-image-openvswitch
         soft: true
     vars: &container_image_vars
@@ -60,6 +62,8 @@
     name: atmosphere-upload-container-image-ovn
     parent: atmosphere-upload-container-image
     dependencies:
+      - name: atmosphere-buildset-registry
+        soft: false
       - name: atmosphere-upload-container-image-openvswitch
         soft: true
     vars: *container_image_vars