update sensitive data page

Author: lobsterkatie

src/platforms/common/data-management/sensitive-data/index.mdx

@@ -49,7 +49,7 @@ If you _do not_ wish to use the default PII behavior, you can also choose to ide
 
 ## Scrubbing Data
 
-SDKs provide a <PlatformIdentifier name="before-send" /> hook, which is invoked before an event is sent and can be used to modify event data to remove sensitive information. Using <PlatformIdentifier name="before-send" /> in the SDKs to **scrub any data before it is sent** is the recommended scrubbing approach, so sensitive data never leaves the local environment.
+SDKs provide a <PlatformIdentifier name="before-send" /> hook, which is invoked before an error or message event is sent and can be used to modify event data to remove sensitive information. (Some SDKs also provide a <PlatformIdentifier name="before-send-transaction" /> hook which does the same thing for transactions.) Using <PlatformIdentifier name="before-send" /> and <PlatformIdentifier name="before-send-transaction" /> in the SDKs to **scrub any data before it is sent** is the recommended scrubbing approach, so sensitive data never leaves the local environment.
 
 <PlatformContent includePath="configuration/before-send" />