Update New-AzNetworkSecurityGroup.md (#15512)

line breaks in the STEP 1 2 3 section for formatting

Author: AAron

src/Network/Network/help/New-AzNetworkSecurityGroup.md

@@ -45,9 +45,9 @@ $nsg = New-AzNetworkSecurityGroup -ResourceGroupName TestRG -Location westus -Na
     "NSG-FrontEnd" -SecurityRules $rule1,$rule2
 ```
 
-Step:1 Create a security rule allowing access from the Internet to port 3389.
-Step:2 Create a security rule allowing access from the Internet to port 80.
-Step:3 Add the rules created above to a new NSG named NSG-FrontEnd.
+Step:1 Create a security rule allowing access from the Internet to port 3389.<br>
+Step:2 Create a security rule allowing access from the Internet to port 80.<br>
+Step:3 Add the rules created above to a new NSG named NSG-FrontEnd.<br>
 
 ## PARAMETERS