[ghex/gtk4-port] ci: Specify BRANCH and see if it gets flatpak to build.

[Logan Rathbone <larathbone src gnome org>]

commit c1786cb6bb9f051fbbd5ae089197add03b6b8f02
Author: Logan Rathbone <poprocks gmail com>
Date:   Sun Dec 5 22:55:18 2021 -0500

    ci: Specify BRANCH and see if it gets flatpak to build.

 .gitlab-ci.yml | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index af4b28b..94d48d1 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -8,6 +8,7 @@ flatpak:
         APP_ID: "org.gnome.GHex.Devel"
         RUNTIME_REPO: "https://nightly.gnome.org/gnome-nightly.flatpakrepo";
         BUNDLE: "ghex-dev.flatpak"
+        BRANCH: "gtk4-port"
     extends: .flatpak
 
 nightly: