docs: number collect-chip removal as BUG-628

BUG-626 and BUG-627 are already reserved on staging by the skipped-health holdout brief.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/tests/rectification-spoken-collect.test.ts

@@ -118,7 +118,7 @@ test("cases current_question remains the submit contract, not a visual slot", ()
   assert.doesNotMatch(wrap, /CHOICE_STOP_LABEL/);
   // 旧：口述采集挂「没有」「记不清」芯片（BUG-605 / BUG-618）
   // 新：芯片全部去掉；打字「没有 / 记不清」仍走短路
-  // 原因：BUG-626，用户一致差评
+  // 原因：BUG-628，用户一致差评
   assert.doesNotMatch(wrap, /rectification-collect-replies/);
   assert.doesNotMatch(wrap, /rectification-collect-reply/);
   assert.doesNotMatch(wrap, /send\("message", "没有"\)/);