build

Update logback-classic, logback-core to 1.4.14 #6461

Job	Run time
scaladoc-check	2m 51s
compiler-warnings	2m 18s
docker-tests	19m 0s
build-mdbook	7s
format-check	3m 57s
integration-tests (ubuntu-latest, oopsla19)	16m 46s
integration-tests (ubuntu-latest, arrays)	9m 31s
unit-tests (ubuntu-latest)	6m 44s
integration-tests (macos-latest, oopsla19)	20m 47s
unit-tests (macos-latest)	12m 0s
	1h 34m 1s

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