Update TOC.yml

Removing Preview, GA was launched at Ignite (11/15)

Author: harissohail55

articles/defender-for-cloud/TOC.yml

@@ -453,7 +453,7 @@
       href: defender-for-apis-introduction.md
     - name: Support and prerequisites
       href: defender-for-apis-prepare.md
-    - name: Protect your APIs with Defender for APIs (Preview)
+    - name: Protect your APIs with Defender for APIs
       href: defender-for-apis-deploy.md
     - name: Validate APIs alerts
       displayName: validate, api, apis