[gnomemm-website/kjellahl/testci] CI: Add docbook-xml and docbook-xsl deps

[Kjell Ahlstedt <kjellahl src gnome org>]

commit 3925db17b010f480228e23d68b037e8b65481372
Author: Kjell Ahlstedt <kjellahlstedt gmail com>
Date:   Fri Jan 7 11:11:31 2022 +0100

    CI: Add docbook-xml and docbook-xsl deps

 .gitlab-ci.yml | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 8c4f33a..d092b2d 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -17,7 +17,10 @@ website_build:
       itstool
       libxml2-utils
       xsltproc
+      docbook-xml
+      docbook-xsl
   #    docbook5-xml
+  #    docbook-xsl-ns
   script:
     - export DEBIAN_FRONTEND=noninteractive
     - apt update && apt -y upgrade && apt -y install $DEPENDENCIES