diff --git a/runbooks/grafana-dashboard.md b/runbooks/grafana-dashboard.md
index bcb4b62..1bd9fac 100644
--- a/runbooks/grafana-dashboard.md
+++ b/runbooks/grafana-dashboard.md
@@ -3,3 +3,5 @@
 (Initial — see git history.)
 
 # update 1 (2026-04)
+
+# update 12 (2026-04)