docs: Add changelog entry for inline suggestions feature #288

Job	Run time
cli-integration (windows)	35s
updater-test-args / validate-inputs	21s
updater-test-args / cancel-previous-run	3s
updater-create-pr / cancel-previous-run	3s
cli-integration (macos)	4m 20s
cli-integration (ubuntu)	17s
updater-create-pr / validate-inputs	9s
updater-create-pr / update	24s
updater-test-args / update	13s
updater-test-outputs	4s
	6m 29s

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