[libsoup/ipv6-runner] CI: Switch to a ipv6 runner

[Claudio Saavedra <csaavedra src gnome org>]

commit 7b27da7dbb1d390fd83a7833fd347f5ff176c47e
Author: Claudio Saavedra <csaavedra igalia com>
Date:   Mon Aug 12 16:46:35 2019 +0300

    CI: Switch to a ipv6 runner
    
    We setup a specific runner with ipv6 enabled in Docker to try
    this out.

 .gitlab-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 686477e2..96653828 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -4,7 +4,7 @@ image: registry.gitlab.gnome.org/gnome/libsoup/master:v2
   tags:
     # We need runners supporting IPv6:
     # https://gitlab.gnome.org/Infrastructure/GitLab/issues/313
-    - osuosl
+    - ipv6
 
 fedora-meson-x86_64:
   extends: .build