Wrong date format in function app settings when set by az cli

### Describe the bug

We are currently developing a simple Azure Function App that utilizes a Cosmos DB Change Feed Trigger. This trigger includes an option to set a **StartFromTime** for the cursor, which is intended to prevent the processing of all data within the container from the beginning. The recommended format for the StartTime is ISO 8601.

The issue arises when configuring the service using Azure CLI. Despite entering the **StartFromTime** in the correct ISO 8601 format, the configuration value format appears to be altered upon execution of the CLI command. This unexpected change in the timestamp format leads to an issue where the Function App is unable to correctly map the trigger endpoint.

### Related command

az functionapp config appsettings set --name $name --resource-group $group --settings "test_StartFromTime=2023-01-03T12:12:23Z"

### Errors


### Issue script & Debug output

the problem is not with the script, only with the result

### Expected behavior

Az Cli should set the value in the defined format

### Environment Summary

azure-cli 2.53.1

core 2.53.1
telemetry 1.1.0

Dependencies:
msal 1.24.0b2
azure-mgmt-resource 23.1.0b2

Python location 'C:\Program Files (x86)\Microsoft SDKs\Azure\CLI2\python.exe'
Extensions directory 'C:\Users\pawel\.azure\cliextensions'

Python (Windows) 3.10.10 (tags/v3.10.10:aad5f6a, Feb 7 2023, 17:05:00) [MSC v.1929 32 bit (Intel)]

Legal docs and information: aka.ms/AzureCliLegal

### Additional context

_No response_