Improve the bug/feature templates to provide a clearer hint why cython-users...

Improve the bug/feature templates to provide a clearer hint why cython-users is a better place to get help than the bug tracker.

.github/ISSUE_TEMPLATE/bug_report.md

@@ -9,9 +9,14 @@ assignees: ''
 
 <!--
 **PLEASE READ THIS FIRST:**
-- Do not use the bug and feature tracker for support requests. Use the `cython-users` mailing list instead.
-- Did you search for similar issues already? Please do, it helps to save us precious time that we otherwise could not invest into development.
-- Did you try the latest master branch or pre-release? It might already have what you want to report. Also see the [Changelog](https://github.com/cython/cython/blob/master/CHANGES.rst) regarding recent changes.
+- DO NOT use the bug and feature tracker for general questions and support requests.
+  Use the `cython-users` mailing list instead.
+  It has a wider audience, so you get more and better answers.
+- Did you search for similar issues already?
+  Please do, it helps to save us precious time that we otherwise could not invest into development.
+- Did you try the latest master branch or pre-release?
+  It might already have what you want to report.
+  Also see the [Changelog](https://github.com/cython/cython/blob/master/CHANGES.rst) regarding recent changes.
 -->
 
 **Describe the bug**

.github/ISSUE_TEMPLATE/feature_request.md

@@ -9,9 +9,14 @@ assignees: ''
 
 <!--
 **Note:**
-- Do not use the bug and feature tracker for support requests. Use the `cython-users` mailing list instead.
-- Did you search for similar issues already? Please do, it helps to save us precious time that we otherwise could not invest into development.
-- Did you try the latest master branch or pre-release? It might already have what you want to report. Also see the [Changelog](https://github.com/cython/cython/blob/master/CHANGES.rst) regarding recent changes.
+- DO NOT use the bug and feature tracker for general questions and support requests.
+  Use the `cython-users` mailing list instead.
+  It has a wider audience, so you get more and better answers.
+- Did you search for similar issues already?
+  Please do, it helps to save us precious time that we otherwise could not invest into development.
+- Did you try the latest master branch or pre-release?
+  It might already have what you want to report.
+  Also see the [Changelog](https://github.com/cython/cython/blob/master/CHANGES.rst) regarding recent changes.
 -->
 
 **Is your feature request related to a problem? Please describe.**