bug issue template: before reporting bug certifies

.github/ISSUE_TEMPLATE/bug_report.md

@@ -7,6 +7,13 @@ assignees: ''
 
 ---
 
+<!--
+**before reporting bug certifies**
+1. Please speak English, this is the language everybody of us can speak and write
+2. Please take a moment to search that an issue doesn't already exist here https://github.com/prest/prest/issues
+3. Please give all relevant information below for bug reports, incomplete details will be handled as an invalid report
+-->
+
 **Describe the bug**
 A clear and concise description of what the bug is.