[librsvg: 17/23] Install gi-docgen during the CI

[Marge Bot <marge-bot src gnome org>]

commit f62d3f2afd79b2545fdbdda5060dd7c182a304bb
Author: Federico Mena Quintero <federico gnome org>
Date:   Thu Jan 6 18:50:46 2022 -0600

    Install gi-docgen during the CI
    
    Part-of: <https://gitlab.gnome.org/GNOME/librsvg/-/merge_requests/650>

 .gitlab-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 681a28c54..dd9bcc398 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -179,7 +179,7 @@ opensuse:tumbleweed:
     # make check runs extra tests that require extra crates, hence cache is pushed
     - .cache_push
   before_script:
-    - sudo zypper install -y python38-docutils
+    - sudo zypper install -y python38-docutils python3-gi-docgen
   rules:
     - if: '$CI_PIPELINE_SOURCE == "push"'
     - if: '$CI_PIPELINE_SOURCE == "schedule"'