Update swagger documentation
[NO NEW TESTS NEEDED]
// Schemes: http, https
// Host: podman.io
// BasePath: /
-// Version: 3.2.0
+// Version: 4.0.0
// License: Apache-2.0 https://opensource.org/licenses/Apache-2.0
// Contact: Podman <podman@lists.podman.io> https://podman.io/community/
//
