chore(deps): bump openrewrite.version from 8.78.4 to 8.78.6 #6733

Job	Run time
sample_operators_tests (sample-operators/leader-election)	3m 36s
sample_operators_tests (sample-operators/tomcat-operator)	3m 8s
sample_operators_tests (sample-operators/mysql-schema)	2m 50s
sample_operators_tests (sample-operators/webpage)	3m 22s
sample_operators_tests (sample-operators/metrics-processing)	8m 6s
	21m 2s

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