Add security blog to further reading (#28297)

* Add security blog to further reading

* Add blog link for observability pipelines

Author: estherk15

content/en/observability_pipelines/_index.md

@@ -38,6 +38,9 @@ further_reading:
 - link: "https://www.datadoghq.com/blog/observability-pipelines-route-logs-microsoft-sentinel/"
   tag: "blog"
   text: "Simplify your SIEM migration to Microsoft Sentinel with Datadog Observability Pipelines"
+- link: "https://www.datadoghq.com/blog/sled-observability-pipelines/"
+  tag: "blog"
+  text: "How state, local, and education organizations can manage logs flexibly and efficiently using Datadog Observability Pipelines"
 ---
 
 {{< site-region region="gov" >}}

content/en/security/_index.md

@@ -72,6 +72,9 @@ further_reading:
   - link: "https://www.datadoghq.com/blog/cloud-security-roundup-devsecops-threat-detection-ai/"
     tag: "Blog"
     text: "Cloud security research and guide roundup: DevSecOps, threat detection, and AI"
+  - link: "https://www.datadoghq.com/blog/key-security-metrics/"
+    tag: "Blog"
+    text: "Key metrics for measuring your organization's security posture"
 cascade:
     algolia:
         rank: 70
@@ -144,4 +147,4 @@ After you [set up Sensitive Data Scanner][25], use the Summary page to see detai
 [22]: /security/code_security/software_composition_analysis/
 [23]: /security/code_security/iast/
 [24]: /sensitive_data_scanner/
-[25]: /sensitive_data_scanner/setup/
+[25]: /sensitive_data_scanner/setup/