input: Write a python function to send a message to an SNS topic using boto3.
  assert send_sns_message('arn:aws:sns:eu-west-1:123456789012:my-topic', 'Test message 1')['ResponseMetadata']['HTTPStatusCode'] == 200
  assert send_sns_message('arn:aws:sns:eu-west-1:123456789012:my-topic', 'Test message 2')['ResponseMetadata']['HTTPStatusCode'] == 200
  assert send_sns_message('arn:aws:sns:eu-west-1:123456789012:my-topic', 'Test message 3')['ResponseMetadata']['HTTPStatusCode'] == 200
output: def send_sns_message(topic_arn, message):
      import boto3
  
      sns_client = boto3.client('sns')
      
      response = sns_client.publish(
          TopicArn=topic_arn,
          Message=message
      )
      
      return response