chore: update datadog metrics list (#770)

* chore: add bounced metric and fix typo

* fix: remove markdown syntax for hyperlink that doesn't work here

content/integrations/extensions/datadog.mdx

@@ -83,6 +83,11 @@ Get started with our Datadog dashboard starter kit to start monitoring Knock met
     type="count"
     description="How many deliveries ended in failure (not retryable), segmented by `channel` and `workflow` key."
   />
+  <Attribute
+    name="knock.message_bounced_error.total"
+    type="count"
+    description="How many deliveries ended in non-retryable errors from downstream providers, segmented by `channel` and `workflow` key."
+  />
   <Attribute
     name="knock.workflow_recipient_run.total"
     type="count"
@@ -96,7 +101,7 @@ Get started with our Datadog dashboard starter kit to start monitoring Knock met
   <Attribute
     name="knock.integration_event_received.total"
     type="count"
-    description="Hhe raw number of events received by Knock from an [integration source](https://docs.knock.app/integrations/sources/overview), segmented by `source_type`."
+    description="The raw number of events received by Knock from an integration source, segmented by `source_type`."
   />
   <Attribute
     name="knock.integration_action_run.total"