[mutter] ci: Put wild cards in single quotes

[Marge Bot <marge-bot src gnome org>]

commit 11ae4c2084efefc2d256a7ab8af17e6889a275b0
Author: Jonas Ådahl <jadahl gmail com>
Date:   Mon Mar 7 10:16:01 2022 +0100

    ci: Put wild cards in single quotes
    
    To not expand coverage-* into actual coverage files, put the argument
    in quotes, so that all files are added.
    
    Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2324>

 .gitlab-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index e0231c2dc2..113e9c3d4e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -337,7 +337,7 @@ coverage:
   stage: analyze
   script:
     - mkdir coveragereport
-    - gcovr --add-tracefile coverage-*.json
+    - gcovr --add-tracefile 'coverage-*.json'
         --html-details --print-summary --output coveragereport/index.html
   artifacts:
     paths: