fix broken link

policy/tpa-rfc-33-monitoring.md

@@ -11,7 +11,7 @@ system.
 
 As part of the fleet-wide [Debian bullseye upgrades](howto/upgrades/bullseye), we are
 evaluating whether or not it is worth upgrading from the [Debian Icinga
-1 package](https://tracker.debian.org/pkg/icinga) to [Icinga 2](https://tracker.debian.org/pkg/icinga), or whether we should consider
+1 package](https://tracker.debian.org/pkg/icinga) to [Icinga 2](https://tracker.debian.org/pkg/icinga2), or whether we should consider
 [switching to Prometheus][tpo/tpa/team#29864] instead.
 
 Icinga 1 is not available in Debian bullseye and this is therefore a