nxos_evpn_vni check_mode (#46612)

Signed-off-by: Trishna Guha <trishnaguha17@gmail.com>
(cherry picked from commit d69700b236)

lib/ansible/modules/network/nxos/nxos_evpn_vni.py

@@ -275,6 +275,7 @@ def main():
             candidate = CustomNetworkConfig(indent=3)
             candidate.add(commands, parents=parents)
             candidate = candidate.items_text()
+            if not module.check_mode:
                 load_config(module, candidate)
                 results['changed'] = True
             results['commands'] = candidate