Merge pull request kubernetes-sigs#423 from shapeblue/fix-metadata

Fix metadata for upgrades

Author: k8s-ci-robot

metadata.yaml

@@ -9,3 +9,6 @@ releaseSeries:
   - major: 0
     minor: 5
     contract: v1beta1
+  - major: 0
+    minor: 4
+    contract: v1beta1