Update hardening Kubernetes clusters URL in website to the latest ver…

…sion 1.2 (kubernetes#44031)

* Update 2021-10-05-nsa-cisa-hardening.md

NSA and CISA released the 1.0 version of the Kubernetes hardening guide in August 2021 and updated it based on industry feedback in March 2022 (version 1.1). The most recent version of the Kubernetes hardening guidance was released in August 2022 with corrections and clarifications.

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* Update 2021-10-05-nsa-cisa-hardening.md

* Update 2021-10-05-nsa-cisa-hardening.md

* Update 2021-10-05-nsa-cisa-hardening.md

content/en/blog/_posts/2021-10-05-nsa-cisa-hardening.md

@@ -17,7 +17,7 @@ and are in no way a direct recommendation from the Kubernetes community or autho
 
 USA's National Security Agency (NSA) and the Cybersecurity and Infrastructure
 Security Agency (CISA)
-released, "[Kubernetes Hardening Guidance](https://media.defense.gov/2021/Aug/03/2002820425/-1/-1/1/CTR_KUBERNETES%20HARDENING%20GUIDANCE.PDF)"
+released Kubernetes Hardening Guidance
 on August 3rd, 2021. The guidance details threats to Kubernetes environments
 and provides secure configuration guidance to minimize risk.
 
@@ -29,6 +29,14 @@ _Note_: This blog post is not a substitute for reading the guide. Reading the pu
 guidance is recommended before proceeding as the following content is 
 complementary.
 
+{{% pageinfo color="primary" %}}
+**Update, November 2023:**
+
+The National Security Agency (NSA) and the Cybersecurity and Infrastructure Security Agency (CISA) released the 1.0 version of the Kubernetes hardening guide in August 2021 and updated it based on industry feedback in March 2022 (version 1.1).
+
+The most recent version of the Kubernetes hardening guidance was released in August 2022 with corrections and clarifications. Version 1.2 outlines a number of recommendations for [hardening Kubernetes clusters](https://media.defense.gov/2022/Aug/29/2003066362/-1/-1/0/CTR_KUBERNETES_HARDENING_GUIDANCE_1.2_20220829.PDF).
+{{% /pageinfo %}}
+
 ## Introduction and Threat Model
 
 Note that the threats identified as important by the NSA/CISA, or the intended audience of this guidance, may be different from the threats that other enterprise users of Kubernetes consider important. This section