FIX - fix issue template (scikit-learn-contrib#196)

Author: Badr-MOUFAD

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,13 +1,13 @@
 ---
 name: Bug report
-
+about: Report a problem
 ---
 
-# Describe the bug
+## Describe the bug
 
 <!-- Concise description of the bug -->
 
-# Steps to reproduce
+## Steps to reproduce
 
 <!-- You can provide a snippet that reproduces the bug -->
 

.github/ISSUE_TEMPLATE/feature_request.md

@@ -1,14 +1,15 @@
 ---
 name: Feature request
+about: Suggest a new feature
 title: FEAT - Give a title to the feature request
 ---
 
-# Description of the feature
+## Description of the feature
 
 <!-- Describe the feature. for instance, is it related a problem? -->
 
 
-# Considered alternatives
+## Considered alternatives
 
 <!-- List the considered alternative (if any) -->
 

.github/pull_request_template.md

@@ -1,4 +1,4 @@
-# Context of the PR
+## Context of the PR
 
 <!--
 
@@ -7,7 +7,7 @@ Any detail to be able to relate the PR changes
 
 -->
 
-# Contributions of the PR
+## Contributions of the PR
 
 <!-- List the contribution of the PR -->