hostname parameter should be host_name (#35798)

the hostname parameter is wrong.  It will throw an error: "Unsupported parameters for (vyos_system) module: hostname Supported parameters include: domain_name, domain_search, host, host_name, name_server, password, port, provider, ssh_keyfile, state, timeout, username"  It is supposed to be host_name.  Only the example for documentation seems to be wrong in the module.

lib/ansible/modules/network/vyos/vyos_system.py

@@ -72,7 +72,7 @@ commands:
 EXAMPLES = """
 - name: configure hostname and domain-name
   vyos_system:
-    hostname: vyos01
+    host_name: vyos01
     domain_name: test.example.com
 
 - name: remove all configuration