Fix billing check for trial sub status (#5054)

## Context
Sub status is not binary as you can also be in trial mode and still
should be able to share invite link. This PR should fix this issue

packages/twenty-server/src/engine/core-modules/auth/services/sign-in-up.service.ts

@@ -144,8 +144,8 @@ export class SignInUpService {
 
     assert(
       !this.environmentService.get('IS_BILLING_ENABLED') ||
-        workspace.subscriptionStatus === 'active',
-      'Workspace subscription status needs to be active',
+        workspace.subscriptionStatus !== 'incomplete',
+      'Workspace subscription status is incomplete',
       ForbiddenException,
     );