Update IRP.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Signed-off-by: |7eter l-|. l3oling <peter.boling@gmail.com>

Author: pboling

IRP.md

@@ -107,8 +107,7 @@ References
 ----------
 - See `SECURITY.md` for the project's official disclosure channel (Tidelift).
 
-Appendix: Example checklist for an incident
-------------------------------------------
+## Appendix: Example checklist for an incident
 - [ ] Acknowledge report to reporter (24-72 hours)
 - [ ] Reproduce and classify severity
 - [ ] Prepare and test a fix in a branch