Update virtual-wan-faq.md - Acrolinx fix

Author: American-Dipper

articles/virtual-wan/virtual-wan-faq.md

@@ -405,7 +405,7 @@ Yes, BGP communities generated by on-premises will be preserved in Virtual WAN.
 
 Yes, BGP communities generated by BGP Peers will be preserved in Virtual WAN. Communities are preserved across the same hub, and across interhub connections. This also applies to Virtual WAN scenarios using Routing Intent Policies.
 
-### What ASN numbers are supported for remotely attached On-Premises networks running BGP?
+### What ASN numbers are supported for remotely attached on-premises networks running BGP?
 
 You can use your own public ASNs or private ASNs for your on-premises networks. You can't use the ranges reserved by Azure or IANA: