[gexiv2/wip/phako/gi-docgen] Temporarily enable gtk-doc for ci

[Jens Georg <jensgeorg src gnome org>]

commit bf2ce6a3155c5b8083fad4233b9823a101debcc1
Author: Jens Georg <mail jensge org>
Date:   Sun May 16 12:25:50 2021 +0200

    Temporarily enable gtk-doc for ci

 .gitlab-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 60dbc7d..854b732 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -9,7 +9,7 @@
     - schedules
   script:
     - flatpak-builder build-dir ${MANIFEST_PATH} --stop-at=gexiv2 --user --disable-rofiles-fuse
-    - flatpak build build-dir meson _build
+    - flatpak build build-dir meson _build -Dgtk_doc=true
     - flatpak build build-dir ninja -C _build
     - flatpak build build-dir ninja -C _build test
   artifacts: