(AzureCXP) fixes MicrosoftDocs/azure-docs#105781

Changes has been inmade in line no 149
From
az ad sp list --display-name $SERVICE_PRINCIPAL_NAME --query "[].appId" --output tsv
To
az identity show -n $SERVICE_PRINCIPAL_NAME -g $RESOURCE_GROUP_NAME --subscription $SUBSCRIPTION_ID --query "clientId" -o tsv

Author: AjayBathini-MSFT

articles/container-registry/container-registry-helm-repos.md

@@ -146,7 +146,7 @@ Run  `helm registry login` to authenticate with the registry. You may pass [regi
             --scopes $(az acr show --name $ACR_NAME --query id --output tsv) \
              --role acrpush \
             --query "password" --output tsv)
-  USER_NAME=$(az ad sp list --display-name $SERVICE_PRINCIPAL_NAME --query "[].appId" --output tsv)
+  USER_NAME=$(az identity show -n $SERVICE_PRINCIPAL_NAME -g $RESOURCE_GROUP_NAME --subscription $SUBSCRIPTION_ID --query "clientId" -o tsv)
   ```
 - Authenticate with your [individual Azure AD identity](container-registry-authentication.md?tabs=azure-cli#individual-login-with-azure-ad) to push and pull Helm charts using an AD token.
   ```azurecli