I am creating a new scratch org with a configuration file to enable "SocialCustomerService" feature flag. But SFDX cli it not recognizing this feature flag. Getting an error "SocialCustomerService is not a valid Features value". "SocialCustomerService" is available as a feature flag in the link https://developer.salesforce.com/docs/atlas.en-us.sfdx_dev.meta/sfdx_dev/sfdx_dev_scratch_orgs_def_file_config_values.htm
Feature section of scratch org configuration, "features": ["AuthorApex","LightningServiceConsole", "StateAndCountryPicklist", "SocialCustomerService"]