feat: update bug report and feature request templates

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -1,7 +1,6 @@
 name: 🐛 Bug | Bug Report
 description: 报告错误或异常问题 | Report an error or unexpected behavior
-title:
-  default: "[Bug] Something is not working"
+title: "[Bug]: "
 labels:
   - bug
 

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -1,8 +1,6 @@
 name: ✨ 增加功能 | Feature Request
 description: 为此项目提出一个新想法或建议 | Suggest a new idea for this project
-title:
-  default: "[Feature] Idea for new feature"
-
+title: "[Feature]: "
 labels:
   - enhancement