Add additional fields to Organization struct to support additional fields in Organization.Edit

[kuhlman-labs]

The update an organization API has additional configurable fields that the Organization struct does not support:

WebCommitSignoffRequired
AdvancedSecurityEnabledForNewRepos
DependabotAlertsEnabledForNewRepos
DependabotSecurityUpdatesEnabledForNewRepos
DependencyGraphEnabledForNewRepos
SecretScanningEnabledForNewRepos
SecretScanningPushProtectionEnabledForNewRepos

Proposing adding these fields to enable them to be configurable with Organization.Edit