allow emails without a tld (#2762)

It's perfectly valid to have an email address without a TLD, for instance:

- test@localhost
- test@svc-in-same-k8s-namespace
- test@internal-corp

Fixes #2667

server/src/domain/user/dto/update-user.dto.ts

@@ -5,7 +5,7 @@ import { toEmail, toSanitized } from '@app/immich/utils/transform.util';
 
 export class UpdateUserDto {
   @IsOptional()
-  @IsEmail()
+  @IsEmail({ require_tld: false })
   @Transform(toEmail)
   email?: string;