chore(deps): bump com.diffplug.spotless:spotless-maven-plugin (#3065) #5964

Job	Run time
sample_operators_tests (sample-operators/leader-election)	3m 53s
sample_operators_tests (sample-operators/tomcat-operator)	3m 18s
sample_operators_tests (sample-operators/mysql-schema)	3m 9s
sample_operators_tests (sample-operators/webpage)	3m 31s
	13m 51s

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