Test markdown in issue template

Author: adamwathan

.github/ISSUE_TEMPLATE/1.bug_report.yml

@@ -36,4 +36,4 @@ body:
       required: true
   - type: markdown
     attributes:
-      value: Describe your issue below, including any important steps to reproduce and what behavior you expect.
+      value: "## Describe your issue\nDescribe the problem you're seeing, any important steps to reproduce and what behavior you expect instead"