Restore NVDA process helper's name (#16134)
Fixes #16094
Summary of the issue:
UAC requests were informing users that "A free and open source screen reader for Microsoft Windows" wanted to make changes to their PC.
Description of user facing changes
Changed back to the old behaviour where UAC dialogs called the launcher "NVDA".
Description of development approach
Updated nvda_slave.pyw's script in setup.py to have version_info.description be name rather than description.
