Merge pull request #262781 from vhorne/fw-landing

add refernce card

Author: prmerger-automator[bot]

articles/firewall/index.yml

@@ -131,3 +131,15 @@ landingContent:
         links:
          - text: Azure network security
            url: ../networking/security/index.yml
+
+# Card
+  - title: Reference
+    linkLists:
+      - linkListType: reference
+        links:
+          - text: Azure CLI
+            url: /cli/azure/network/firewall
+          - text: Azure PowerShell
+            url: /powershell/module/az.network/new-azfirewall
+          - text: REST
+            url: /rest/api/firewall