[DEB packaging] Surround [version]-[revision] with underscores rather than dashes in filenames

[lbssousa]

• Version: 7.11.3

• Target: Linux (deb)

According to this reference, Debian binary package naming convention is
[name]_[version]-[revision]_[arch].deb, but electron-builder currently builds DEB packages with a different naming convention: [name]-[version]-[revision]-[arch].deb.

Althougth the package filename doesn't interfere in its installation proccess, I think it would be good to follow Debian conventions and surround [version]-[revision] with underscores rather than dashes in filename.