service/donate.md

@@ -817,7 +817,7 @@ developing the Django app after @kez had gone.
 
 ## Monitoring and metrics
 
-The donate site is monitored from [Prometheus](howto/prometheus), both
+The donate site is monitored from [Prometheus](service/prometheus), both
 at the system level (normal metrics like disk, CPU, memory, etc) and
 at the application level.