docs: update bug report template

.github/ISSUE_TEMPLATE/BUG_REPORT.md

@@ -2,9 +2,38 @@
 name: Bug report
 about: Report an issue with this library
 ---
-<!-- Please search existing issues and discussions to avoid creating duplicates. -->
+<!--
+
+Before creating a new bug report, please take a few moments to review the following:
+- Have you searched existing issues and discussions about your problem? Your problem might be already solved, and this could avoid creating duplicates
+- Is this a security related bug? If so, disclose it privately following the procedure described in https://github.com/openpgpjs/openpgpjs/blob/main/SECURITY.md
+- Is this an implementation or support question? If so, open a discussion here https://github.com/openpgpjs/openpgpjs/discussions/categories/q-a 
+
+Thank you for your collaboration! 
+
+-->
+
+**Expected behavior**
+<!--- Tell us what should happen -->
+
+**Current behavior**
+<!--- Tell us what happens instead of the expected behavior -->
+
+**Possible solution** 
+<!--- Not obligatory, but suggest a fix/reason for the bug -->
+
+**Specifications**
 
 - OpenPGP.js version:
 - Affected platform (Browser or Node.js version):
 
-<!-- Describe the bug you have encountered -->
+**Description**
+<!-- 
+
+Describe the bug you have encountered in detail. If suitable, include:
+- Code snippets (so we can reproduce it). As minimal and precisely as possible. Please put these in appropriate code fences for better readability.
+- Steps required to reproduce the bug 
+- The error stack 
+
+Also include any other information you want to share that is relevant to the issue being reported.
+-->