Release 1.9.0rc1 to GitHub, PyPI, and Docker #125

Job	Run time
Log Inputs	1s
Bump package version, Generate changelog / audit-version-in-code	11s
Bump package version, Generate changelog / audit-changelog	13s
Bump package version, Generate changelog / log-inputs	1s
Bump package version, Generate changelog / skip-generate-changelog	1s
Bump package version, Generate changelog / skip-version-bump	1s
Bump package version, Generate changelog / create-temp-branch	0s
Bump package version, Generate changelog / generate-changelog-bump-version	0s
Bump package version, Generate changelog / run-integration-tests	0s
Bump package version, Generate changelog / run-unit-tests	0s
Bump package version, Generate changelog / run-integration-tests-flaky	0s
Bump package version, Generate changelog / merge-changes-into-target-branch	0s
Bump package version, Generate changelog / determine-release-sha	3s
Build, Test, Package	0s
[Log output] Bump package version, Generate changelog	0s
GitHub Release	0s
PyPI Release	0s
Docker Release / Get container tags	13s
Docker Release / Set up Docker image builder, build and push	1m 20s
Slack Notification	0s
	2m 4s

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