ci: fix ignored errors within appraisal loop #3357

Job	Run time
postgresql / pg / ubuntu-latest	39s
mysql / mysql2 / ubuntu-latest	1m 31s
kafka / racecar / ubuntu-latest	11m 24s
mysql / trilogy / ubuntu-latest	1m 17s
postgresql / que / ubuntu-latest	2m 24s
kafka / rdkafka / ubuntu-latest	15m 33s
kafka / ruby_kafka / ubuntu-latest	5m 48s
rabbitmq / bunny / ubuntu-latest	1m 5s
other / dalli / ubuntu-latest	2m 40s
redis / redis / ubuntu-latest	1m 3s
redis / resque / ubuntu-latest	1m 54s
other / mongo / ubuntu-latest	2m 35s
redis / sidekiq / ubuntu-latest	6m 12s
	54m 5s

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