gen-cards: regenerate Use-it block

README.md

@@ -47,8 +47,8 @@ import CoreAIKit
 
 let dlm = try await KitDiffusionLM(catalog: "llada-8b")
 let reply = try await dlm.reply(to: prompt)
-// reply: the denoised answer. onStep streamed the live canvas per forward
-// (still-masked positions as ░) — parallel fill-in, not left-to-right
+// reply: the denoised answer — pass onStep: to watch the canvas fill in per forward
+// (still-masked positions as ░), in parallel, not left-to-right
 ```
 
 The take-home is [`Examples/DiffuseChat/Sources/QuickStart.swift`](https://github.com/john-rocky/coreai-kit/blob/main/Examples/DiffuseChat/Sources/QuickStart.swift)