Added description to single net interface (#51602)

* Added description to single net interface

* ec2_instance single iface description changelog

changelogs/fragments/51602-ec2_instance_single_iface_description.yaml

@@ -0,0 +1,2 @@
+bugfixes:
+  - ec2_instance - Correctly adds description when adding a single ENI to the instance

lib/ansible/modules/cloud/amazon/ec2_instance.py

@@ -926,6 +926,8 @@ def build_network_spec(params, ec2=None):
                 ec2=ec2
             )
             spec['Groups'] = [g['GroupId'] for g in groups]
+        if network.get('description') is not None:
+            spec['Description'] = network['description']
         # TODO more special snowflake network things
 
         return [spec]