chore: regens API reference docs (#889)

diff --git a/docs/dyn/cloudiot_v1.projects.locations.registries.devices.states.html b/docs/dyn/cloudiot_v1.projects.locations.registries.devices.states.html
index 3581f85..261424e 100644
--- a/docs/dyn/cloudiot_v1.projects.locations.registries.devices.states.html
+++ b/docs/dyn/cloudiot_v1.projects.locations.registries.devices.states.html
@@ -84,7 +84,7 @@
 newest first).
 
 Args:
-  name: string, The name of the device. For example,
+  name: string, Required. The name of the device. For example,
 `projects/p0/locations/us-central1/registries/registry0/devices/device0` or
 `projects/p0/locations/us-central1/registries/registry0/devices/{num_id}`. (required)
   numStates: integer, The number of states to list. States are listed in descending order of