fix: typos (#2755) #5037

Job	Run time
sample_operators_tests (sample-operators/mysql-schema)	2m 20s
sample_operators_tests (sample-operators/tomcat-operator)	2m 41s
sample_operators_tests (sample-operators/webpage)	2m 51s
sample_operators_tests (sample-operators/leader-election)	3m 1s
	10m 53s

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