Fix onboarding status refacto (#6533)

see comments in
https://github.com/twentyhq/twenty/pull/6531#pullrequestreview-2217807413
- rename method
- add check before setting create profile pending user var

packages/twenty-server/src/engine/core-modules/onboarding/onboarding.service.ts

@@ -131,7 +131,7 @@ export class OnboardingService {
     });
   }
 
-  async setOnboardingCreateProfileCompletion({
+  async setOnboardingCreateProfilePending({
     userId,
     workspaceId,
     value,