https://github.com/localstack/localstack/blob/e7efc768a20e75feafe3702a5a6e477a233feff2/localstack/utils/aws/aws_stack.py#L904

```
File "/usr/local/lib/python3.8/site-packages/localstack/services/generic_proxy.py", line 50, in <module>
from localstack.utils.aws import aws_stack
File "/usr/local/lib/python3.8/site-packages/localstack/utils/aws/aws_stack.py", line 904, in <module>
) -> dict[str, str]:
TypeError: 'type' object is not subscriptable
```

Please fix to `Dict[str, str]`
auth_header = headers.get("Authorization")
    if auth_header:
        regex = r"Credential=([^/]+)/([^/]+)/([^/]+)/"
        auth_header = re.sub(regex, r"Credential=\1/\2/%s/" % region, auth_header)
        headers["Authorization"] = auth_header
def dynamodb_get_item_raw(request):
    headers = mock_aws_request_headers()
    headers["X-Amz-Target"] = "DynamoDB_20120810.GetItem"
    new_item = make_http_request(
        url=config.service_url("dynamodb"),
        method="POST",
        data=json.dumps(request),
        headers=headers,
    )
    new_item = new_item.text
    new_item = new_item and json.loads(new_item)
    return new_item
def create_dynamodb_table(