Fix wrong SQL query expectation

ee/spec/models/ee/user_spec.rb

@@ -635,7 +635,7 @@ RSpec.describe User do
           SELECT "users".* FROM "users"
           WHERE ("users"."state" IN ('active'))
           AND
-          ("users"."user_type" IS NULL OR "users"."user_type" IN (NULL, 6, 4))
+          ("users"."user_type" IS NULL OR "users"."user_type" IN (6, 4))
           AND
           ("users"."user_type" IS NULL OR "users"."user_type" NOT IN (2, 6, 1, 3, 7, 8))
         SQL