fix(java): mention that send-default-pii must be enabled for HTTP request bodies to be captured (#12799)

* fix(java): mention that send-default-pii must be enabled for HTTP request bodies to be captured

* change wording

* use PlatformLink instead of hardcoded link

Author: lcian

docs/platforms/java/common/configuration/options.mdx

@@ -143,6 +143,9 @@ This parameter controls whether integrations should capture HTTP request bodies.
 - `medium`: Medium and small requests will be captured (typically 10KB).
 - `always`: The SDK will always capture the request body as long as Sentry can make sense of it.
 
+For request bodies to be captured, the <PlatformIdentifier name="send-default-pii" /> flag must also be enabled.
+Please consult the <PlatformLink to="/configuration/options/#send-default-pii">documentation for <PlatformIdentifier name="send-default-pii" /></PlatformLink> to evaluate whether you would want to enable it, making sure to manually remove the data you don't want to send using our features for <PlatformLink to="/data-management/sensitive-data">managing Sensitive Data</PlatformLink>.
+
 </ConfigKey>
 
 <ConfigKey name="enabled">