.github: clean up TEMPLATES

Signed-off-by: Gyuho Lee <gyuhox@gmail.com>

.github/ISSUE_TEMPLATE.md

@@ -1,4 +1,10 @@
-# Bug reporting
+
+
+<br>
+<br>
+**!!! PLEASE READ BEFORE REPORTING !!!**
+<br>
+<br>
 
 A good bug report has some very specific qualities, so please read over our short document on [reporting bugs][report_bugs] before submitting a bug report.
 

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,4 +1,10 @@
-# Contributing guidelines
+
+
+<br>
+<br>
+**!!! PLEASE READ BEFORE CONTRIBUTING !!!**
+<br>
+<br>
 
 Please read our [contribution workflow][contributing] before submitting a pull request.