[gnome-builder] gitlab-ci: add node14 dependency

[Christian Hergert <chergert src gnome org>]

commit 6c29c9eac4def19c0331115371f04f9b5e24a767
Author: Christian Hergert <chergert redhat com>
Date:   Thu Nov 11 13:19:45 2021 -0800

    gitlab-ci: add node14 dependency
    
    For upcoming merge request so that we have it available.

 .gitlab-ci.yml | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 046934267..7c3c232b0 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -15,6 +15,7 @@ flatpak:
   before_script:
     - flatpak --user remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
     - flatpak --user install -y flathub org.freedesktop.Sdk.Extension.llvm12//21.08
+    - flatpak --user install -y flathub org.freedesktop.Sdk.Extension.node14//21.08
 
 nightly:
     extends: '.publish_nightly'