new example 4/workaround (#16437)

* new example 4/workaround

* Update src/Network/Network/help/Set-AzNetworkSecurityRuleConfig.md

Co-authored-by: Yeming Liu <11371776+isra-fel@users.noreply.github.com>

Co-authored-by: Yeming Liu <11371776+isra-fel@users.noreply.github.com>

Author: trudolf-msft

src/Network/Network/help/Set-AzNetworkSecurityRuleConfig.md

@@ -67,6 +67,16 @@ Updates a network security rule configuration for a network security group. (aut
 Set-AzNetworkSecurityRuleConfig -Access Allow -Description 'Allow RDP' -DestinationAddressPrefix * -DestinationPortRange 3389 -Direction Inbound -Name 'rdp-rule' -NetworkSecurityGroup <PSNetworkSecurityGroup> -Priority 1 -Protocol Tcp -SourceAddressPrefix 'Internet' -SourcePortRange *
 ```
 
+### Example 4
+
+Updates a network security rule configuration for a network security group (Source IP address)
+
+```powershell
+$nsg = Get-AzNetworkSecurityGroup -ResourceGroupName "MyResource" -Name "MyNsg"
+($nsg.SecurityRules | Where-Object {$_.Name -eq "RuleName"}).SourceAddressPrefix = ([System.String[]] @("xxx.xxx.xxx.xxx"))
+$nsg | Set-AzNetworkSecurityGroup | Get-AzNetworkSecurityRuleConfig -Name "RuleName"
+```
+
 ## PARAMETERS
 
 ### -Access