Update gcloud version

Change-Id: I8908edde256c398fa0942078eef673ee994945b4
diff --git a/cobalt.ensure b/cobalt.ensure
index 5554204..6a42c77 100644
--- a/cobalt.ensure
+++ b/cobalt.ensure
@@ -18,4 +18,4 @@
 
 # gcloud
 @Subdir gcloud/google-cloud-sdk
-infra/gcloud/${platform} version:180.0.1.chromium0
+infra/gcloud/${platform} version:206.0.0.chromium0