chore(deps): bump openrewrite.version from 8.78.3 to 8.78.4 #6730

Job	Run time
sample_operators_tests (sample-operators/mysql-schema)	2m 56s
sample_operators_tests (sample-operators/leader-election)	3m 43s
sample_operators_tests (sample-operators/metrics-processing)	7m 39s
sample_operators_tests (sample-operators/webpage)	3m 15s
sample_operators_tests (sample-operators/tomcat-operator)	3m 11s
	20m 44s

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