chore(定时任务): no.8 模板显示名称改为 no.12（id 仍为 no8）

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

offline-backend-20260512/backend/packages/harness/deerflow/runtime/scheduler/template_fill.py

@@ -186,7 +186,7 @@ TEMPLATES: tuple[TemplateSpec, ...] = (
     ),
     TemplateSpec(
         id="no8",
-        name="no.8",
+        name="no.12",
         description="",
         file="no8/no8.html",
         # 数据存于 <script id="DATA" type="application/json"> 元素(同 no.4/no.7 元素注入),