build: create "latest" wheel installable by pip-24.1

[aronatkins]

As of the pip-24.1 release, our "latest" wheel cannot be installed:

pip install https://cdn.posit.co/connect/rsconnect-python/latest/rsconnect_python-latest-py2.py3-none-any.whl
#> ERROR: Invalid requirement: 'rsconnect-python==latest': Expected end or semicolon (after name and no valid version specifier)
#>     rsconnect-python==latest
#>                     ^

Our "latest" wheel needs to be adjusted so its version is usable by pip.