Currently the gitian-win-signer.yml produces OUTFILE names without -unsigned stripped out
This is due to regex having an% in front of it
$ INFILE="bitcoin-0.19.0-win64-setup-unsigned.exe"
$ echo "${INFILE/%-unsigned}"
bitcoin-0.19.0-win64-setup-unsigned.exe
$ echo "${INFILE/-unsigned}"
bitcoin-0.19.0-win64-setup.exe
Fixes #17361