Update configuration.md

Added the information about the limitation for the number of IP addresses that can be added in the staticwebapp.config.json

Author: rapopescu16

articles/static-web-apps/configuration.md

@@ -323,7 +323,7 @@ The `platform` section controls platform specific settings, such as the API lang
 
 ## Networking
 
-The `networking` section controls the network configuration of your static web app. To restrict access to your app, specify a list of allowed IP address blocks in `allowedIpRanges`.
+The `networking` section controls the network configuration of your static web app. To restrict access to your app, specify a list of up to 25 allowed IP address blocks in `allowedIpRanges`.
 
 > [!NOTE]
 > Networking configuration is only available in the Azure Static Web Apps Standard plan.