docs: clarify entitlement parameter assigned_units (#122)

- [ ] Regenerate this pull request now.

PiperOrigin-RevId: 409501969

Source-Link: googleapis/googleapis@e03933d

Source-Link: googleapis/googleapis-gen@5cf2555
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiNWNmMjU1NWMwNjkxZTRhMTFiZGUzOTUwYWIyMmQ4Y2IzZjIzYTU3MCJ9

google/cloud/channel_v1/types/entitlements.py

@@ -88,8 +88,7 @@ class Entitlement(proto.Message):
             The response may include the following output-only
             Parameters:
 
-            -  assigned_units: The number of licenses assigned to a
-               user.
+            -  assigned_units: The number of licenses assigned to users.
 
             -  max_units: The maximum assignable units for a flexible
                offer.