Use newer import-images image (#17)

For the tags, see
https://quay.io/repository/packit/import-images?tab=tags

For the fix the new image includes, see
packit/deployment@b97193d

(packit-prod & stream-prod don't need the change)

Author: jpopelka

values/import-images/fedora-source-git-prod.yaml

@@ -1,5 +1,5 @@
 image:
-  tag: "369a9d1"
+  tag: "6c940e9"
 
 host: https://api.auto-prod.gi0n.p1.openshiftapps.com:6443