Fix Dataloader testing examples #1970

Job	Run time
test (Gemfile, 3.2)	1m 11s
test (gemfiles/rails_7.0.gemfile, 3.1)	1m 21s
lint	1m 7s
javascript_test	1m 25s
test (gemfiles/rails_master.gemfile, 3.1)	1m 42s
mongodb_test (gemfiles/mongoid_6.gemfile)	1m 35s
test (gemfiles/rails_7.0.gemfile, 3.2)	1m 19s
mongodb_test (gemfiles/mongoid_7.gemfile)	1m 26s
postgres_test	2m 14s
test (gemfiles/rails_7.1.gemfile, 3.3)	1m 37s
system_tests	2m 0s
test (gemfiles/rails_master.gemfile, 3.3)	1m 55s
	18m 52s

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