Update release note

Signed-off-by: Richard Wall <[email protected]>

content/docs/releases/release-notes/release-notes-1.16.md

@@ -9,9 +9,9 @@ cert-manager 1.16 includes various improvements to the metrics in the cert-manag
 
 ### Extended Metrics
 
-The webhook component now has a metrics server, so that platform teams can
-monitor its performance and gain more information about the underlying Go
-runtime in the event of a problem.
+The webhook and cainjector components now have metrics servers,
+so that platform teams can monitor the performance of all the cert-manager components
+and gain more information about the underlying Go runtime in the event of a problem.
 Read the [Prometheus Metrics](../../devops-tips/prometheus-metrics.md) page to learn more.
 
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