github: update issue template

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -11,6 +11,8 @@ body:
       options:
         - label: I've searched [platform-specific issues](https://github.com/jtroo/kanata/blob/main/docs/platform-known-issues.adoc), [issues](https://github.com/jtroo/kanata/issues) and [discussions](https://github.com/jtroo/kanata/discussions) to see if this has been reported before.
           required: true
+        - label: My issue is unrelated to multiple key presses, OR it is and I've confirmed it is not [key ghosting](https://github.com/jtroo/kanata/discussions/822).
+          required: true
   - type: textarea
     id: summary
     attributes: