Update bug_report.md

.github/ISSUE_TEMPLATE/bug_report.md

@@ -4,28 +4,28 @@ about: Create a report to help us improve
 
 ---
 
-**Describe the bug**
+### Describe the bug
 A clear and concise description of what the bug is.
 
-**To Reproduce**
+### To Reproduce
 Steps to reproduce the behavior:
 1. Go to '...'
 1. Click on '...'
 1. Scroll down to '...'
 1. See error
 
-**Expected behavior**
+### Expected behavior
 A clear and concise description of what you expected to happen.
 
-**Screenshots**
+### Screenshots
 If applicable, add screenshots to help explain your problem.
 
-**System and software specifications**
+### System and software specifications
  - Simulation environment and version
 
-**Approach to solve issue**
+### Approach to solve issue
 1. Add '...' in clas `...`
 1. Change component names from `...` to `...`
 
-**Additional context**
+### Additional context
 Add any other context about the problem here.