Merge branch 'bocarbonell-master-patch-06762' into 'master'

Add info and link about the Puma exporter

See merge request gitlab-org/gitlab!72336

doc/administration/monitoring/prometheus/index.md

@@ -345,6 +345,12 @@ memory, disk, and CPU utilization.
 
 [Read more about the node exporter](node_exporter.md).
 
+### Puma exporter
+
+The Puma exporter allows you to measure various Puma metrics.
+
+[Read more about the Puma exporter](puma_exporter.md).
+
 ### Redis exporter
 
 The Redis exporter allows you to measure various Redis metrics.