[Security] 9.0.2 release notes (#1452)

Adds the 9.0.2 Security and Elastic Defend release notes.

Preview: [9.0.2 release
notes](https://docs-v3-preview.elastic.dev/elastic/docs-content/pull/1452/release-notes/elastic-security/)

---------

Co-authored-by: Janeen Mikell Roberts <[email protected]>
Co-authored-by: Gabriel Landau <[email protected]>

Author: 3 people

release-notes/elastic-security/index.md

@@ -20,8 +20,18 @@ To check for security updates, go to [Security announcements for the Elastic sta
 % *
 
 % ### Fixes [elastic-security-X.X.X-fixes]
+
 % *
 
+## 9.0.2 [elastic-security-9.0.2-release-notes]
+
+### Features and enhancements [elastic-security-9.0.2-features-enhancements]
+There are no new features or enhancements.
+
+### Fixes [elastic-security-9.0.2-fixes]
+* Fixes a bug that caused an error message to appear when you changed entity asset criticality from the entity flyout [#219858]({{kib-pull}}219858)
+* Fixes a bug in {{elastic-defend}} 8.16.0 where {{elastic-endpoint}} would incorrectly report some files as being `.NET`.
+
 ## 9.0.1 [elastic-security-9.0.1-release-notes]
 
 ### Features and enhancements [elastic-security-9.0.1-features-enhancements]