fix(docs): 补齐#5926前端发布版本

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

changelogs-v2/2026-08/12_5926_排车Step2栅格改期残留旧实派行不回显明文-前端修复-管理后台.md

@@ -10,7 +10,7 @@ gateway_status: "verified"
 frontend_status: "verified"
 frontend_owner: "mmg"
 frontend_ref: "01ae772f"
-target_release: ""
+target_release: "v2.1"
 verified_at: "2026-08-12"
 status_note: "#5926 明文回显+删后刷新已由前端 01ae772f 验证；但原『取消残留派车』误用整槽接口导致 #5937 P0。逐日取消新契约以 #5937 为准：使用 cells[].assignmentId 调 POST /admin/fleet/assignments/{assignmentId}/cancel-residue，禁止老 DELETE /assignments/{assignmentId} 和槽位删除。#5937 前端状态仍 pending。"
 updated_at: "2026-08-12"