Update feature_request.md

Author: satoryu

.github/ISSUE_TEMPLATE/feature_request.md

@@ -2,19 +2,21 @@
 name: Feature request
 about: Suggest an idea for this project
 title: ''
-labels: ''
+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 [...]
+## Problem
 
-**Describe the solution you'd like**
-A clear and concise description of what you want to happen.
+Please share a clear and concise description of what the problem is. 
 
-**Describe alternatives you've considered**
-A clear and concise description of any alternative solutions or features you've considered.
+> Ex. I'm always frustrated when [...]
+
+## Solution
+
+Please describe the solution you'd like. 
 
-**Additional context**
-Add any other context or screenshots about the feature request here.
+## Alternative solutions
+
+A clear and concise description of any alternative solutions or features you've considered.