Update network-security-perimeter-concepts.md

Author: mbender-ms

articles/private-link/network-security-perimeter-concepts.md

@@ -103,11 +103,13 @@ A network security perimeter-aware private link resource is a PaaS resource that
 
 ## Supported access rules' types
 
-Direction | Access rule type | 
+Network security perimeter supports the following access rule types:
+
+| Direction | Access rule type | 
 |---------------------------|---------------|
-Inbound | Subscription based rules |
-Inbound | IP based rules (check respective onboarded private link resources for v6 support)| 
-Outbound | FQDN based rules |
+| Inbound | Subscription based rules |
+| Inbound | IP based rules (check respective onboarded private link resources for v6 support)| 
+| Outbound | FQDN based rules |
 
 ## Limitations of a network security perimeter