add toc nodes

Author: ErikjeMS

windows-365/TOC.yml

@@ -7,4 +7,8 @@ items:
   href: business-enterprise-comparison.md
 - name: Export Cloud PC names 
   href: export-cloud-pc-names.md
+- name: Business documentation
+  href: business/index.yml
+- name: Enterprise documentation
+  href: enterprise/index.yml