Update libgnome-volume-control .gitmodules link for gnome-3-28 branch
Broken URL inside .gitmodules update for gnome-3-28 branch. Already done in master, backport gnome-3-28 branch.
Issue: #606 (closed)
Commit : fb39cc59
git clone -b gnome-3-28 --recursive https://gitlab.gnome.org/GNOME/gnome-shell.git
Cloning into 'gnome-shell'...
remote: Enumerating objects: 76626, done.
remote: Counting objects: 100% (76626/76626), done.
remote: Compressing objects: 100% (16253/16253), done.
remote: Total 76626 (delta 60671), reused 75783 (delta 60026)
Receiving objects: 100% (76626/76626), 23.17 MiB | 13.87 MiB/s, done.
Resolving deltas: 100% (60671/60671), done.
Submodule 'subprojects/gvc' (https://git.gnome.org/browse/libgnome-volume-control) registered for path 'subprojects/gvc'
Cloning into 'subprojects/gvc'...
error: RPC failed; result=22, HTTP code = 404
fatal: The remote end hung up unexpectedly
Clone of 'https://git.gnome.org/browse/libgnome-volume-control' into submodule path 'subprojects/gvc' failed