Update issue templates

Author: lyuwenyu

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,21 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: lyuwenyu
+
+---
+
+**Star RTDETR**
+请先在RTDETR主页点击**star**以支持本项目
+Star RTDETR to help more people discover this project. 
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is. 
+If applicable, add screenshots to help explain your problem. 
+
+**To Reproduce**
+Steps to reproduce the behavior.