Regen docs (#364)

diff --git a/docs/dyn/pubsub_v1beta2.projects.topics.html b/docs/dyn/pubsub_v1beta2.projects.topics.html
index 9898eaa..1f5c349 100644
--- a/docs/dyn/pubsub_v1beta2.projects.topics.html
+++ b/docs/dyn/pubsub_v1beta2.projects.topics.html
@@ -580,6 +580,10 @@
 If the resource does not exist, this will return an empty set of
 permissions, not a NOT_FOUND error.
 
+Note: This operation is designed to be used for building permission-aware
+UIs and command-line tools, not for authorization checking. This operation
+may "fail open" without warning.
+
 Args:
   resource: string, REQUIRED: The resource for which the policy detail is being requested.
 `resource` is usually specified as a path. For example, a Project