update changelog for release 4.5.12 #1855

Job	Run time
supported_jdks (core, 11)	2m 6s
latest_jdk (ubuntu-latest, core)	1m 58s
supported_jdks (core, 17)	2m 3s
latest_jdk (ubuntu-latest, consumer -x :consumer:junit:clojureTest)	3m 16s
supported_jdks (core, 18)	1m 48s
latest_jdk (ubuntu-latest, provider)	3m 20s
supported_jdks (consumer, 11)	3m 39s
latest_jdk (ubuntu-latest, pact-specification-test)	1m 33s
supported_jdks (consumer, 17)	3m 41s
latest_jdk (windows-latest, core)	4m 3s
supported_jdks (consumer, 18)	3m 14s
latest_jdk (windows-latest, consumer -x :consumer:junit:clojureTest)	4m 17s
supported_jdks (provider, 11)	3m 39s
latest_jdk (windows-latest, provider)	5m 0s
latest_jdk (windows-latest, pact-specification-test)	2m 14s
supported_jdks (provider, 17)	3m 48s
latest_jdk (macos-latest, core)	1m 19s
supported_jdks (provider, 18)	3m 21s
latest_jdk (macos-latest, consumer -x :consumer:junit:clojureTest)	3m 20s
supported_jdks (pact-specification-test, 11)	1m 36s
latest_jdk (macos-latest, provider)	2m 22s
supported_jdks (pact-specification-test, 17)	1m 38s
latest_jdk (macos-latest, pact-specification-test)	1m 8s
supported_jdks (pact-specification-test, 18)	1m 34s
	1h 5m 57s

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