[DOCS-10927] Add preview box for human name PII detection (#29471)

* add preview box

* apply suggestions

Author: maycmlee

content/en/security/sensitive_data_scanner/scanning_rules/_index.md

@@ -9,6 +9,10 @@ further_reading:
   text: "Best practices for creating custom scanning rules"
 ---
 
+{{< callout url="https://www.datadoghq.com/product-preview/human-name-pii-detection-in-logs-using-machine-learning/" btn_hidden="false" >}}
+Human name PII detection in logs using machine learning is in Preview. To enroll, click <b>Request Access</b>.
+{{< /callout >}}
+
 ## Telemetry Data
 
 Sensitive Data Scanner for Telemetry Data uses scanning rules to determine what sensitive information to match within the data. This data can be from your application logs, APM spans, RUM events, and events from Event Management. You can use Datadog's [Scanning Rule Library][1] to create rules or you can create [custom rules][2].

content/en/security/sensitive_data_scanner/scanning_rules/library_rules.md

@@ -9,6 +9,10 @@ further_reading:
       text: "Set up Sensitive Data Scanner"
 ---
 
+{{< callout url="https://www.datadoghq.com/product-preview/human-name-pii-detection-in-logs-using-machine-learning/" btn_hidden="false" >}}
+Human name PII detection in logs using machine learning is in Preview. To enroll, click <b>Request Access</b>.
+{{< /callout >}}
+
 ## Overview
 
 The Scanning Rule Library is a collection of predefined rules for detecting common patterns such as email addresses, credit card numbers, API keys, authorization tokens, and more.