Add Front Door WAF exception add example

Author: JingnanXu

Commands/network/front-door/waf-policy/managed-rules/exception/_add.md

@@ -7,3 +7,10 @@ Create Exception
 ### [2025-11-01](/Resources/mgmt-plane/L3N1YnNjcmlwdGlvbnMve30vcmVzb3VyY2Vncm91cHMve30vcHJvdmlkZXJzL21pY3Jvc29mdC5uZXR3b3JrL2Zyb250ZG9vcndlYmFwcGxpY2F0aW9uZmlyZXdhbGxwb2xpY2llcy97fQ==/2025-11-01.xml) **Stable**
 
 <!-- mgmt-plane /subscriptions/{}/resourcegroups/{}/providers/microsoft.network/frontdoorwebapplicationfirewallpolicies/{} 2025-11-01 properties.managedRules.exceptionsList.exceptions[] -->
+
+#### examples
+
+- Add a managed rule exception to a WAF policy.
+    ```bash
+        network front-door waf-policy managed-rules exception add --resource-group rg1 --policy-name Policy1 --match-variable RequestUri --match-values /login.php --value-match-operator Equals --scopes [0].rule-set-type=Microsoft_DefaultRuleSet [0].rule-set-version=2.0
+    ```