Update issue templates (#917)

* Update issue templates

* remove bug_report.md

* Update error-report.md

.github/ISSUE_TEMPLATE/bug_report.md → .github/ISSUE_TEMPLATE/error-report.md

 ---
-name: Bug report
+name: Error report
 about: Create a report to help us improve
 title: ''
 labels: ''
@@ -7,29 +7,22 @@ assignees: ''
 
 ---
 
-Thanks for your bug report and we appreciate that a lot.
+Thanks for your error report and we appreciate it a lot.
 
 **Checklist**
-- [ ] I have searched related issues but could not get the expected help.
-- [ ] The bug has not been fixed in the latest version.
+1. I have searched related issues but cannot get the expected help.
+2. The bug has not been fixed in the latest version.
 
 **Describe the bug**
 A clear and concise description of what the bug is.
-If there are any related issues or upstream bugs, please also refer to them.
 
-**Error traceback**
+**Reproduction**
 1. What command or script did you run?
 ```
 A placeholder for the command.
 ```
-2. If applicable, paste the error trackback here using code blocks.
-```
-A placeholder for trackback.
-```
-
-**Reproduction details**
-1. Did you make any modifications on the code? Did you understand what you have modified?
-2. What dataset did you use?
+2. Did you make any modifications on the code or config? Did you understand what you have modified?
+3. What dataset did you use?
 
 **Environment**
  - OS: [e.g., Ubuntu 16.04.6]
@@ -40,5 +33,11 @@ A placeholder for trackback.
 - CUDA and CUDNN version
 - [optional] Other information that may be related (such as `$PATH`, `$LD_LIBRARY_PATH`, `$PYTHONPATH`, etc.)
 
+**Error traceback**
+If applicable, paste the error trackback here.
+```
+A placeholder for trackback.
+```
+
 **Bug fix**
 If you have already identified the reason, you can provide the information here. If you are willing to create a PR to fix it, please also leave a comment here and that would be much appreciated!