chore(deps): bump org.eclipse.jetty:jetty-server from 12.1.8 to 12.1.… #6967

Job	Run time
sample_operators_tests (sample-operators/webpage)	3m 14s
sample_operators_tests (sample-operators/tomcat-operator)	3m 31s
sample_operators_tests (sample-operators/operations)	8m 47s
sample_operators_tests (sample-operators/mysql-schema)	3m 6s
sample_operators_tests (sample-operators/leader-election)	3m 36s
	22m 14s

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