fix error message (#16264)

The error was: TypeError: fail_json() takes exactly 1 argument (2 given)

lib/ansible/module_utils/ec2.py

@@ -151,7 +151,7 @@ def get_aws_connection_info(module, boto3=False):
                 # here we don't need to make an additional call, will default to 'us-east-1' if the below evaluates to None.
                 region = botocore.session.get_session().get_config_variable('region')
             else:
-                module.fail_json("Boto3 is required for this module. Please install boto3 and try again")
+                module.fail_json(msg="Boto3 is required for this module. Please install boto3 and try again")
 
     if not security_token:
         if 'AWS_SECURITY_TOKEN' in os.environ: