Fix Shell example for /firewalls/{firewallId}/devices

Author: leslitagordita

openapi.yaml

@@ -9279,7 +9279,7 @@ paths:
       - lang: Shell
         source: >
           curl -H "Authorization: Bearer $TOKEN" \
-              https://api.linode.com/v4/firewalls/123/devices
+              https://api.linode.com/v4beta/networking/firewalls/123/devices
       - lang: CLI
         source: >
           linode-cli firewalls devices-list 123