update: show add self hosted site button

Author: Momo Ozawa

WordPress/Jetpack/AppConfiguration.swift

@@ -15,7 +15,7 @@ import Foundation
     @objc static let allowsDomainRegistration: Bool = true
     @objc static let showsReader: Bool = true
     @objc static let showsCreateButton: Bool = true
-    @objc static let showAddSelfHostedSiteButton: Bool = false
+    @objc static let showAddSelfHostedSiteButton: Bool = true
     @objc static let showsQuickActions: Bool = true
     @objc static let showsFollowedSitesSettings: Bool = true
     @objc static let showsWhatIsNew: Bool = true