Remove backticks from ChangeLog and add Extended Location clarification

Author: kjilla

src/Network/Network/ChangeLog.md

@@ -19,8 +19,8 @@
 --->
 
 ## Upcoming Release
-* Added EdgeZone parameter support for Azure Firewall
-  * Added `-EdgeZone` parameter to `New-AzFirewall` cmdlet
+* Added EdgeZone (Extended Location) parameter support for Azure Firewall
+  * Added -EdgeZone parameter to New-AzFirewall cmdlet
   * When EdgeZone is specified, zones property is automatically set to null
 
 ## Version 7.22.0