Bump Rugged to 0.28.1
This resolves a minor link issue in libgit2 with deprecated functions: https://github.com/libgit2/libgit2/releases
This coincides with the Gitaly bump: gitaly!1154 (merged)
This resolves a minor link issue in libgit2 with deprecated functions: https://github.com/libgit2/libgit2/releases
This coincides with the Gitaly bump: gitaly!1154 (merged)