docs: Update changelog entry to clarify GITHUB_WORKFLOW_REF issue #313

Job	Run time
cli-integration (windows)	31s
cli-integration (ubuntu)	25s
cli-integration (macos)	35s
updater-create-pr / cancel-previous-run	5s
updater-test-args / cancel-previous-run	6s
updater-test-args / validate-inputs	8s
updater-create-pr / validate-inputs	8s
updater-test-args / update	12s
updater-create-pr / update	21s
updater-test-outputs	1s
	2m 32s

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