Add changelog entry for GITHUB_WORKFLOW_REF fix #304

Job	Run time
updater-test-args / cancel-previous-run	3s
cli-integration (windows)	23s
cli-integration (ubuntu)	16s
cli-integration (macos)	4m 19s
updater-test-args / validate-inputs	8s
updater-create-pr / validate-inputs	8s
updater-create-pr / cancel-previous-run	5s
updater-create-pr / update	13s
updater-test-args / update	7s
updater-test-outputs	-1s
	5m 41s

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