Update GnuPG git links to https

git.gnupg.org states:

> For actual work you should clone a repository; use
> `git clone https://dev.gnupg.org/source/foo.git`
> or
> `git clone git://git.gnupg.org/foo.git`
2 jobs for work/blu-base/morehttps in 2 minutes and 26 seconds (queued for 80 minutes and 12 seconds)
Status Job ID Name Coverage
  Test
passed #89001
smoke-test

00:01:51

passed #89000
unit-test

00:00:34