update changelog for release 4.6.9 #1801

Job	Run time
supported_jdks (core, 17)	2m 15s
latest_jdk (ubuntu-latest, core)	1m 51s
supported_jdks (core, 18)	1m 56s
latest_jdk (ubuntu-latest, consumer -x :consumer:junit:clojureTest)	3m 18s
supported_jdks (consumer, 17)	3m 39s
latest_jdk (ubuntu-latest, provider)	3m 25s
supported_jdks (consumer, 18)	3m 10s
latest_jdk (ubuntu-latest, pact-specification-test)	1m 26s
supported_jdks (provider, 17)	3m 59s
latest_jdk (windows-latest, core)	2m 50s
supported_jdks (provider, 18)	3m 27s
latest_jdk (windows-latest, consumer -x :consumer:junit:clojureTest)	5m 0s
latest_jdk (windows-latest, provider)	4m 53s
latest_jdk (windows-latest, pact-specification-test)	2m 10s
supported_jdks (pact-specification-test, 17)	1m 46s
latest_jdk (macos-latest, core)	2m 55s
supported_jdks (pact-specification-test, 18)	1m 29s
latest_jdk (macos-latest, consumer -x :consumer:junit:clojureTest)	5m 41s
latest_jdk (macos-latest, provider)	3m 57s
latest_jdk (macos-latest, pact-specification-test)	3m 9s
	1h 2m 16s

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