Update feature_request.md (#837)

.github/ISSUE_TEMPLATE/feature_request.md

@@ -6,14 +6,18 @@ labels: enhancement
 assignees: ''
 ---
 
-**Is your feature request related to a problem? Please describe.**
-A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+## Is your feature request related to a problem? Please describe.
 
-**Describe the solution you'd like**
-A clear and concise description of what you want to happen.
+<!-- A clear and concise description of what the problem is. Ex. I'm always frustrated when [...] -->
 
-**Describe alternatives you've considered**
-A clear and concise description of any alternative solutions or features you've considered.
+## Describe the solution you'd like
 
-**Additional context**
-Add any other context or screenshots about the feature request here.
+<!-- A clear and concise description of what you want to happen. -->
+
+## Describe alternatives you've considered
+
+<!-- A clear and concise description of any alternative solutions or features you've considered. -->
+
+## Additional context
+
+<!-- Add any other context or screenshots about the feature request here. -->