fixing toc

Author: batamig

articles/defender-for-iot/organizations/TOC.yml

@@ -134,7 +134,7 @@
       - name: Deploy OT certificates
         href: how-to-deploy-certificates.md
       - name: Install OT system software
-          href: how-to-install-software.md
+        href: how-to-install-software.md
       - name: Connect OT sensors to the cloud
         items:
         - name: Connect OT sensors to Defender for IoT