[libdmapsharing/LIBDMAPSHARING_3_0] .gitlab-ci.yml: install GTK2, not GTK3 for this branch

[W. Michael Petullo <wmpetullo src gnome org>]

commit 1469d8fb115997bdf1748c83f17ca7fbb871dddc
Author: W. Michael Petullo <mike flyn org>
Date:   Tue Jun 30 20:39:29 2020 -0500

    .gitlab-ci.yml: install GTK2, not GTK3 for this branch

 .gitlab-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 0cde479..d62f346 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -6,7 +6,7 @@ build-ubuntu:
 
   before_script:
     - apt-get update
-    - apt-get install -q -y --no-install-recommends autoconf automake check gcc gtk-doc-tools 
libavahi-client-dev libavahi-glib-dev libgdk-pixbuf2.0-dev libgee-0.8-dev libglib2.0-dev 
libgstreamer-plugins-base1.0-dev libgtk-3-dev libsoup2.4-dev libtool pkg-config
+    - apt-get install -q -y --no-install-recommends autoconf automake check gcc gtk-doc-tools 
libavahi-client-dev libavahi-glib-dev libgdk-pixbuf2.0-dev libgee-0.8-dev libglib2.0-dev 
libgstreamer-plugins-base1.0-dev libgtk-2-dev libsoup2.4-dev libtool pkg-config
 
   script:
     - ./autogen.sh