az sql db update succeeds but service objective is not updated

### Describe the bug

I cannot change service objective from `GP_Gen5_10` to `GP_S_Gen5_2`. The command succeeds but the service objective remains unchanged on the database. The database is still `GP_Gen5_10` after the command is run. See command output for details.

### Related command

```
az sql db update --subscription $SubscriptionId `
--resource-group $ResourceGroupName `
--server $ServerName `
--name $DatabaseName `
--service-objective GP_S_Gen5_2 --debug
```

### Errors

No errors.

### Issue script & Debug output

PS C:\path> az sql db update --subscription `
--resource-group `
--server `
--name `
--service-objective GP_S_Gen5_2 --debug

### Expected behavior

Service Objective is updated.

### Environment Summary

{
"azure-cli": "2.49.0",
"azure-cli-core": "2.49.0",
"azure-cli-telemetry": "1.0.8",
"extensions": {
"azure-devops": "0.26.0",
"bastion": "0.2.4",
"k8s-extension": "1.4.1"
}
}

### Additional context

_No response_