[libgweather/ebassi/doc-fixes] ci: Fix the reference job

[Emmanuele Bassi <ebassi src gnome org>]

commit 5eb41af0aef2f6a99d9a136163de1699ac266e63
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Wed Jun 22 23:26:02 2022 +0100

    ci: Fix the reference job
    
    Build against libsoup2.

 .gitlab-ci.yml | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 29643ab9..70ba4e6f 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -321,7 +321,8 @@ reference:
       redhat-rpm-config
       vala
     MESON_VERSION: "0.55.3"
-    DOCS_FLAGS: -Dgtk_doc=true
+    MESON_EXTRA_FLAGS: "-Dsoup2=true"
+    DOCS_FLAGS: "-Dgtk_doc=true"
     DOCS_PATH: doc/libgweather-4.0
 
 pages: