Fix bug in async client

[tsdev]

Fix bug where in async the sync client was used.

[simlmx]

The repo would benefit from automatic type checking.
This bug would have been found by running something like pyright.

poetry add --group dev pyright
poetry run pyright src

shows this error:

/Users/simon/code/tensorlake/src/tensorlake/documentai/_parse.py:238:32 - error: Argument of type "Client" cannot be assigned to parameter "client" of type "AsyncClient"

(along with 200 others)

[calavera]

Thanks for catching this! We're going to release a new version in pypi shortly with this change in.

[calavera]

Released: https://pypi.org/project/tensorlake/