Linux build for VLS is not executable after download

[hungrybluedev]

The executable generated by the CI is uploaded and available for download from the releases page. However, this approach removes the executable permissions from the file. The fix is simple, just run chmod +x vls_linux_x64.

This additional step can be removed if we ZIP the files before uploading as an asset for release. This will preserve the executable permission and the executable will run with no permission changes necessary.