Changes to GET /api/slack/manifest

the features/slash_commands/items/url response's property type changed from no type to string for status 2XX

the oauth_config/redirect_urls/items response's property type changed from no type to string for status 2XX

the settings/event_subscriptions/request_url response's property type changed from no type to string for status 2XX

the settings/interactivity/request_url response's property type changed from no type to string for status 2XX

added the media type application/json for the response with the status 2XX

api operation id get-api-slack-manifest was added