[gtk: 2/3] ci: Only use letters in "expose_as"

[Emmanuele Bassi <ebassi src gnome org>]

commit ee8970f23de6cbb72418355659f08da773795d0f
Author: Guido Günther <agx sigxcpu org>
Date:   Wed Jan 19 16:39:44 2022 +0100

    ci: Only use letters in "expose_as"

 .gitlab-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 38b770dbc0..b2d911ffe5 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -158,7 +158,7 @@ msys2-mingw64:
     CHERE_INVOKING: "yes"
   artifacts:
     when: always
-    expose_as: 'Windows DLL (MSYS2 64 bit toolchain)'
+    expose_as: 'Windows_DLL_MSYS2_64_bit_toolchain'
     paths:
       - "${CI_PROJECT_DIR}/_build/gtkdll.tar.gz"