ci(wechat-notify): refine AI prompt for commit summarization

- Update prompt instruction to request numbered list format
- Remove title and preamble from AI output for cleaner formatting
- Improve clarity by specifying "要点" (key points) in prompt
- Enhance consistency of release notification messages

.github/workflows/release-notify-wechat.yml

@@ -58,7 +58,7 @@ jobs:
             -d "{
               \"model\": \"qwen-plus\",
               \"input\": {
-                \"prompt\": \"请用中文总结以下代码提交，输出3-5条，面向测试人员：\\n$CONTENT\"
+                \"prompt\": \"请用中文总结以下代码提交，输出3-5条要点，面向测试人员。直接输出编号列表，不要输出标题或前言：\\n$CONTENT\"
               }
             }" | jq -r '.output.text')