[Improvement]: Improve the config toml based on new config model

### Please select the area the issue is related to

Developer Portal

### Please select the aspect the issue is related to

Aspect/Configuration (Config files, settings, env vars, defaults)

### Suggested Improvement

Update the config based on https://github.com/wso2/api-platform/issues/2730

### Related Issues

_No response_