[DOCS-0000] Add scanning rule limit note to telemetry data setup (#37789)

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-authored-by: DeForest Richards <56796055+drichards-87@users.noreply.github.com>

Author: 3 people

content/en/security/sensitive_data_scanner/setup/telemetry_data.md

@@ -96,6 +96,8 @@ Whenever possible, use Datadog's out-of-the-box library rules. These rules are p
 For Terraform, see the [Datadog Sensitive Data Scanner rule][6] resource.
 
 
+**Note**: Sensitive Data Scanner supports up to 750 scanning rules per organization for telemetry data (Logs, APM, RUM, and Events). This limit applies across all scanning groups.
+
 To add scanning rules, perform the following steps:
 
 1. Navigate to the [Sensitive Data Scanner][5] settings page.