Error when calling API to decrypt Cognito MFA code: '65 is not a valid SerializationVersion'

### Security issue notifications

N/A

### Problem:

I'm following the steps here: https://docs.aws.amazon.com/cognito/latest/developerguide/user-pool-lambda-custom-sms-sender.html to have Cognito call my lambda which needs to decrypt the MFA code and use a custom API to email it ( since Cognito doesn't support email MFA :/ )

Getting error: 65 is not a valid SerializationVersion
I never set any version other than LambdaVersion=V1_0 as outlined in the doc above so I have no idea where that is from.

Stack trace:
```
Traceback (most recent call last):
File "/var/task/aws_encryption_sdk/internal/formatting/deserialize.py", line 87, in _verified_version_from_id
return SerializationVersion(version_id)
File "/var/lang/lib/python3.9/enum.py", line 384, in __call__
return cls.__new__(cls, value)
File "/var/lang/lib/python3.9/enum.py", line 702, in __new__
raise ve_exc
ValueError: 65 is not a valid SerializationVersion

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/var/task/aws_encryption_sdk/__init__.py", line 186, in decrypt
plaintext = decryptor.read()
File "/var/task/aws_encryption_sdk/streaming_client.py", line 250, in read
self._prep_message()
File "/var/task/aws_encryption_sdk/streaming_client.py", line 782, in _prep_message
self._header, self.header_auth = self._read_header()
File "/var/task/aws_encryption_sdk/streaming_client.py", line 797, in _read_header
header, raw_header = deserialize_header(self.source_stream, self.config.max_encrypted_data_keys)
File "/var/task/aws_encryption_sdk/internal/formatting/deserialize.py", line 336, in deserialize_header
version = _verified_version_from_id(version_id)
File "/var/task/aws_encryption_sdk/internal/formatting/deserialize.py", line 89, in _verified_version_from_id
raise NotSupportedError("Unsupported version
{}
".format(version_id), error)
aws_encryption_sdk.exceptions.NotSupportedError: ('Unsupported version 65', ValueError('65 is not a valid SerializationVersion'))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/var/task/aws_encryption_sdk/streaming_client.py", line 218, in __exit__
self.close()
File "/var/task/aws_encryption_sdk/streaming_client.py", line 985, in close
raise SerializationError("Footer not read")
aws_encryption_sdk.exceptions.SerializationError: Footer not read
```

### Solution:

Looking for one.

### Out of scope:

N/A

[//]: # (NOTE: If you believe this might be a security issue, please email aws-security@amazon.com instead of creating a GitHub issue. For more details, see the AWS Vulnerability Reporting Guide: https://aws.amazon.com/security/vulnerability-reporting/ )

Bắt đầu với aws_encryption_sdk/internal/formatting/deserialize.py và luồng custom SMS sender trong tài liệu Cognito được liên kết. Tái hiện lời gọi giải mã bằng đầu vào được báo cáo và kiểm tra các lỗi về phiên bản serialization và footer; hoàn thành khi ciphertext MFA được giải mã mà không gặp các exception về phiên bản không được hỗ trợ hoặc footer.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.