chore(deps): bump com.diffplug.spotless:spotless-maven-plugin from 3.… #7607

Job	Run time
sample_operators_tests (sample-operators/mysql-schema)	3m 58s
sample_operators_tests (sample-operators/tomcat-operator)	4m 27s
sample_operators_tests (sample-operators/leader-election)	4m 43s
sample_operators_tests (sample-operators/operations)	9m 48s
sample_operators_tests (sample-operators/webpage)	4m 38s
	27m 34s

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