Fix docker hub login on CI
Fix docker hub login on CI

https://github.com/moby/moby/pull/20565 removed the email flag from the
docker login command.

cantino/huginn,eugenesvk/huginn,dsander/huginn,breandan/huginn,naiyt/huginn,gautamkrishnar/huginn,virtadpt/huginn,Ishfal/huginn,strugee/huginn,eugenesvk/huginn,virtadpt/huginn,gautamkrishnar/huginn,breandan/huginn,huginn/huginn,cantino/huginn,virtadpt/huginn,brianpetro/huginn,brianpetro/huginn,dsander/huginn,strugee/huginn,gautamkrishnar/huginn,dsander/huginn,naiyt/huginn,huginn/huginn,brianpetro/huginn,huginn/huginn,strugee/huginn,naiyt/huginn,cantino/huginn,Ishfal/huginn,eugenesvk/huginn,Ishfal/huginn,breandan/huginn