fix: import typo

src/users/users.module.ts

@@ -2,7 +2,7 @@ import { Module } from '@nestjs/common';
 import { MongooseModule } from '@nestjs/mongoose';
 import { UsersService } from './users.service';
 import { UsersController } from './users.controller';
-import { User, UserSchema } from './User.schema';
+import { User, UserSchema } from './user.schema';
 import { MailerModule } from '../mailer/mailer.module';
 
 @Module({