[gssdp] ci: Properly disable docs for libsoup

[Jens Georg <jensgeorg src gnome org>]

commit b73c898995b7a81a2248bab8374b646e3c2dac55
Author: Jens Georg <mail jensge org>
Date:   Sun Apr 24 21:47:07 2022 +0200

    ci: Properly disable docs for libsoup

 .gitlab-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index f1ce95d..56bef2e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -53,7 +53,7 @@ check-merge-request:
   stage: build
   script:
       - git clone --depth=1 https://gitlab.gnome.org/GNOME/libsoup.git && pushd libsoup
-      - meson _build --prefix=/usr -Dtls_check=false -Dgtk_doc=false
+      - meson _build --prefix=/usr -Dtls_check=false -Ddocs=disabled
       - ninja -C _build install
       - popd
       - meson . build --prefix=/usr -Db_coverage=true