Support the vault banner policy (#7748)

src/db/models/org_policy.rs

@@ -49,6 +49,7 @@ pub enum OrgPolicyType {
     // AutotypeDefaultSetting = 17, // Not supported yet
     // AutoConfirm = 18, // Not supported (not implemented yet)
     // BlockClaimedDomainAccountCreation = 19, // Not supported (Not AGPLv3 Licensed)
+    OrganizationUserNotification = 20,
 }
 
 // https://github.com/bitwarden/server/blob/9ebe16587175b1c0e9208f84397bb75d0d595510/src/Core/AdminConsole/Models/Data/Organizations/Policies/SendOptionsPolicyData.cs#L5