update frontmatter timestamp & missing desc

Author: andrewconnell

docs/solution-guidance/pnp-provisioning-tenant-templates.md

@@ -1,7 +1,7 @@
 ---
 title: PnP Provisioning Tenant Templates
-description: 
-ms.date: 06/05/2020
+description: Think of Tenant Templates as an extension on top of PnP Provisioning or Site Templates. Instead of just provisioning artifacts to a site, you can now create sites, create teams, provision Azure AD entries, provision taxonomy etc.
+ms.date: 04/28/2022
 ms.localizationpriority: high
 ---