chore: add documentation changes

Author: anujmaheshwari1

src/azure-cli/azure/cli/command_modules/acs/_help.py

@@ -1550,7 +1550,7 @@
     short-summary: The OS Type. Linux or Windows.
   - name: --os-sku
     type: string
-    short-summary: The OS SKU of the agent node pool. Ubuntu or CBLMariner for Linux. Windows2019 or Windows2022 for Windows.
+    short-summary: The OS SKU of the agent node pool. Ubuntu, CBLMariner or Ubuntu2204 for Linux. Windows2019 or Windows2022 for Windows.
   - name: --enable-cluster-autoscaler -e
     type: bool
     short-summary: Enable cluster autoscaler.