Update Get-PnPNavigationNode.md

Fixed Missing CommandParameter in Example 3 for Issue #3544

Author: thmeyer-msft

sharepoint/sharepoint-ps/sharepoint-pnp/Get-PnPNavigationNode.md

@@ -44,7 +44,7 @@ Returns all navigation nodes in the quicklaunch navigation
 
 ### ------------------EXAMPLE 3------------------
 ```powershell
-Get-PnPNavigationNode -TopNavigationBar
+Get-PnPNavigationNode -Location TopNavigationBar
 ```
 
 Returns all navigation nodes in the top navigation bar
@@ -121,4 +121,4 @@ Accept pipeline input: False
 
 ## RELATED LINKS
 
-[SharePoint Developer Patterns and Practices](https://aka.ms/sppnp)
+[SharePoint Developer Patterns and Practices](https://aka.ms/sppnp)