[gnome-applets] ci: don't run CI for tags

[Alberts Muktupāvels <muktupavels src gnome org>]

commit c30d62fae333e2985eefc9911de8bef9b0de9c1d
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Tue Mar 3 03:30:18 2020 +0200

    ci: don't run CI for tags

 .gitlab-ci.yml | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 5dcc77de0..475cebbe1 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -4,6 +4,8 @@ stages:
 build-ubuntu:
   image: ubuntu:devel
   stage: build
+  except:
+    - tags
   before_script:
     - apt-get update
     - apt-get install -q -y --no-install-recommends