Fix deb release filenames

[ellie]

See https://github.com/ellie/atuin/pull/46 for context!

Currently the release file builder names does not include the v in the version part filename

For instance, we currently have atuin_0.6.4_amd64.deb, when really what we want is atuin_v0.6.4_amd64.deb

cargo-deb is used to generate the debian package, it might have an option for configuring the filename - otherwise the release pipeline will need changing

Once done, #46 can be reverted