Task 544781: Fix wildcard asterisk formatting in DNAT rule

- Changed five asterisks (*****) to single asterisk (\*) in Source field instruction
- Properly escaped asterisk for markdown rendering
- Corrects typographical error in DNAT rule configuration step

AB#544781

Author: asudbring

articles/firewall/tutorial-firewall-dnat-policy.md

@@ -240,7 +240,7 @@ This rule allows inbound HTTP traffic from the Internet to reach the web server
 1. For **Rule collection group**, select **DefaultDnatRuleCollectionGroup**.
 1. Under **Rules**, for **Name**, type **http-dnat**.
 1. For **Source type**, select **IP address**.
-1. For **Source**, type ***** to allow traffic from any source.
+1. For **Source**, type **\*** to allow traffic from any source.
 1. For **Protocol**, select **TCP**.
 1. For **Destination Ports**, type **80**.
 1. For **Destination Type**, select **IP Address**.