[geary/alatiera/flatpak-fixups] ci: make deps of nightly job explicit

[Jordan Petridis <jpetridis src gnome org>]

commit 895321de32759ee37e76e9ee3d8024f57fb4f5f7
Author: Jordan Petridis <jpetridis gnome org>
Date:   Mon Aug 3 22:24:22 2020 +0000

    ci: make deps of nightly job explicit
    
    also remove the `only` field as its fixed on the template to run on mainline

 .gitlab-ci.yml | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 41519531a..bdccea3b4 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -93,6 +93,5 @@ flatpak:
 
 nightly:
   extends: '.publish_nightly'
-  only:
-    refs:
-      - mainline
+  dependencies: ['flatpak']
+  needs: ['flatpak']