.github: improve the example for the bug report template

We reallt want users to use that one for big topology warnings

Signed-off-by: Brice Goglin <[email protected]>

Author: bgoglin

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,6 +1,6 @@
 ---
 name: Bug report
-about: Report an issue
+about: Report an issue, for instance a warning about invalid topology information
 title: ''
 labels: ''
 assignees: ''