update profile sensitivity (#18393)

Author: patriciasantaana

src/content/docs/ddos-protection/advanced-ddos-systems/concepts.mdx

@@ -95,7 +95,7 @@ The sensitivity to DNS queries that have not been recently seen.
 - A higher sensitivity level means that the mitigation system will begin mitigating faster.
 - A lower sensitivity provides more tolerance for potentially suspicious DNS queries.
 
-The default rate sensitivity is _Medium_.
+The default rate sensitivity and recommended setting is _Low_. You should only increase sensitivity if it is needed based on observed attacks.
 
 ## Filter