AZ SIG ImageDefinition Creation not propagating description and release notes

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**Related command**

az sig image-definition create --resource-group MyResourceGroup \
--gallery-name MyGallery --gallery-image-definition MyImage \
--description
--release-note-uri

**Describe the bug**

I created image definition with description and release note uri, but those fields did not get passed to the SIG backend.

The created object is missing those fields.

**To Reproduce**

Run command above

**Expected behavior**

Returned object should contain description and release note uri

**Environment summary**

PS D:\Users\oe-lvyuanfang> az --version
azure-cli 2.42.0

core 2.42.0
telemetry 1.0.8

Extensions:
kusto 0.5.0

Dependencies:
msal 1.20.0
azure-mgmt-resource 21.1.0b1

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

Python (Windows) 3.10.8 (tags/v3.10.8:aaaf517, Oct 11 2022, 16:37:59) [MSC v.1933 32 bit (Intel)]

Legal docs and information: aka.ms/AzureCliLegal

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**Additional context**

n/a