update metadata.yaml in preparation for v1.5.0 release

jackfrancis · k8s-infra-cherrypick-robot · commit 4dd3d734c2a6 · 2022-09-12T19:57:51.000Z
diff --git a/metadata.yaml b/metadata.yaml
@@ -29,3 +29,6 @@ releaseSeries:
   - major: 1
     minor: 4
     contract: v1beta1
+  - major: 1
+    minor: 5
+    contract: v1beta1
