Redis access-policy-assignment --object_id_alias parameter has incorrect documentation

### Describe the bug

The `--object_id_alias` parameter is documented as:
> User friendly name for object id. Also represents username for token based authentication

Code: https://github.com/Azure/azure-cli/blob/0375c78714ee8d373f6ad590638a7ce0a81d3227/src/azure-cli/azure/cli/command_modules/redis/_params.py#L76-L77
Public docs: https://learn.microsoft.com/en-us/cli/azure/redis/access-policy-assignment?view=azure-cli-latest#az-redis-access-policy-assignment-create

However, it is not used as the username for token authentication. That's still the object ID.

### Related command

redis access-policy-assignment create
redis access-policy-assignment update

### Errors

N/A

### Issue script & Debug output

N/A

### Expected behavior

Documentation should note that the object ID is the username, not the alias.

### Environment Summary

azure-cli 2.61.0

core 2.61.0
telemetry 1.1.0

Extensions:
arcappliance 1.0.2
azurestackhci 0.2.9
connectedk8s 1.6.7
connectedvmware 0.2.1
customlocation 0.1.3
k8s-extension 1.6.1
ssh 2.0.2

Dependencies:
msal 1.28.0
azure-mgmt-resource 23.1.1

Python location '/usr/local/Cellar/azure-cli/2.61.0/libexec/bin/python'
Extensions directory '/Users/mark/.azure/cliextensions'
Development extension sources:
/Users/mark/Projects/arcappliance-cli-extensions

Python (Darwin) 3.11.9 (main, Apr 2 2024, 08:25:04) [Clang 15.0.0 (clang-1500.3.9.4)]

Legal docs and information: aka.ms/AzureCliLegal

Your CLI is up-to-date.

### Additional context

_No response_