[ghex/gtk4-port] CI: update nightly repo URI

[Logan Rathbone <larathbone src gnome org>]

commit ccfc864f3cb9465573b6f200aa83581a8e0f40df
Author: Logan Rathbone <poprocks gmail com>
Date:   Sat Aug 14 15:55:02 2021 -0400

    CI: update nightly repo URI

 .gitlab-ci.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 9dcf8724..7b75d33a 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -5,7 +5,7 @@ flatpak:
     variables:
         MANIFEST_PATH: "org.gnome.GHex.json"
         FLATPAK_MODULE: "ghex"
-        RUNTIME_REPO: "https://sdk.gnome.org/gnome-nightly.flatpakrepo";
+        RUNTIME_REPO: "https://nightly.gnome.org/gnome-nightly.flatpakrepo";
         APP_ID: "org.gnome.GHex"
         BUNDLE: "ghex-dev.flatpak"
-    extends: .flatpak
\ No newline at end of file
+    extends: .flatpak