[geocode-glib/wip/jtojnar/test-lang] ci: Try to reproduce pi installed test failure

[Jan Tojnar <jtojnar src gnome org>]

commit 5649ac7aee65ba591c0d1da4d7650c81ffbb5206
Author: Jan Tojnar <jtojnar gmail com>
Date:   Sat Jul 2 18:31:04 2022 +0200

    ci: Try to reproduce pi installed test failure

 .gitlab-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 557d07f..6fe4043 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -30,7 +30,7 @@ variables:
     - ninja -C _build install
     - ninja -C _build test
     - ninja -C _build dist
-    - gnome-desktop-testing-runner geocode-glib
+    - LANG=en_US.UTF-8 gnome-desktop-testing-runner geocode-glib
   artifacts:
     name: "geocode-glib-${CI_JOB_NAME}-${CI_COMMIT_REF_NAME}"
     when: always