Fix the link for "Build (for testing PR)" in appVeyor message (#17510)
Probably fix-up of #17214.
Follow-up of #17249.
Summary of the issue:
When an appVeyor test failure message is issued, the build link in this message is on l10nUtil.exe rather than on nvda_snapshot_xxxx.exe.
Description of user facing changes
The NVDA snapshot executable will be again downloadable from appVeyor messages.
Description of development approach
Refine the filtering to find the snapshot executable on "nvda_.exe" rather than on ".exe", as done in the deploy script in #17249 in appVeyor script.