[shotwell] ci: Also switch to 3.30 SDK

[Jens Georg <jensgeorg src gnome org>]

commit 6277506b9ad549613ad366683120173a365520e5
Author: Jens Georg <mail jensge org>
Date:   Tue Feb 26 15:32:41 2019 +0100

    ci: Also switch to 3.30 SDK

 .gitlab-ci.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 40c45d4c..7c164d8b 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -7,11 +7,11 @@ variables:
     GIT_SUBMODULE_STRATEGY: recursive
 
 flatpak:
-    image: registry.gitlab.gnome.org/gnome/gnome-runtime-images/gnome:master
+    image: registry.gitlab.gnome.org/gnome/gnome-runtime-images/gnome:3.30
     stage: test
     variables:
         MANIFEST_PATH: "flatpak/org.gnome.Shotwell.json"
-        RUNTIME_REPO: "https://sdk.gnome.org/gnome-nightly.flatpakrepo";
+        RUNTIME_REPO: "https://sdk.gnome.org/gnome.flatpakrepo";
         # Replace with your application name, as written in the manifest
         FLATPAK_MODULE: "shotwell"
         # Make sure to keep this in sync with the Flatpak manifest, all arguments