Fix assign_public_ip: no disregarded (#29691) (#43954)

in case assign_public_ip is False, it is not handled.

lib/ansible/modules/cloud/amazon/ec2.py

@@ -1055,7 +1055,7 @@ def create_instances(module, ec2, vpc, override_count=None):
                     module.fail_json(
                         msg="instance_profile_name parameter requires Boto version 2.5.0 or higher")
 
-            if assign_public_ip:
+            if assign_public_ip is not None:
                 if not boto_supports_associate_public_ip_address(ec2):
                     module.fail_json(
                         msg="assign_public_ip parameter requires Boto version 2.13.0 or higher.")