fixing tz capitalization

Author: batamig

articles/defender-for-cloud/TOC.yml

@@ -102,7 +102,7 @@
     items:
     - name: The Defender for Cloud multicloud solution
       href: multicloud.yml
-    - name: Zero trust infrastructure and integrations
+    - name: Zero Trust infrastructure and integrations
       href: zero-trust.md
     - name: Planning multicloud security
       items: