chore: Bump rubocop-performance 1.20 #2332

Job	Run time
kafka / racecar / ubuntu-latest	11m 2s
mysql / mysql2 / ubuntu-latest	1m 4s
kafka / rdkafka / ubuntu-latest	11m 15s
mysql / trilogy / ubuntu-latest	55s
kafka / ruby_kafka / ubuntu-latest	4m 11s
postgresql / pg / ubuntu-latest	2m 22s
redis / redis / ubuntu-latest	1m 40s
other / dalli / ubuntu-latest	2m 20s
postgresql / que / ubuntu-latest	1m 28s
redis / resque / ubuntu-latest	1m 26s
other / mongo / ubuntu-latest	2m 4s
redis / sidekiq / ubuntu-latest	4m 30s
rabbitmq / bunny / ubuntu-latest	44s
	45m 1s

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