Add xuan-cao-swi to approvers #2348

Job	Run time
kafka / racecar / ubuntu-latest	14m 46s
postgresql / pg / ubuntu-latest	3m 4s
kafka / rdkafka / ubuntu-latest	15m 13s
mysql / mysql2 / ubuntu-latest	1m 15s
postgresql / que / ubuntu-latest	1m 53s
kafka / ruby_kafka / ubuntu-latest	5m 29s
mysql / trilogy / ubuntu-latest	1m 12s
rabbitmq / bunny / ubuntu-latest	55s
redis / redis / ubuntu-latest	2m 3s
other / dalli / ubuntu-latest	2m 25s
redis / resque / ubuntu-latest	1m 42s
other / mongo / ubuntu-latest	2m 11s
redis / sidekiq / ubuntu-latest	5m 57s
	58m 5s

Provide feedback