[gtkmm/gtkmm-4-6] CI: Accept use of deprecated gtk functions

[Kjell Ahlstedt <kjellahl src gnome org>]

commit 4627707ca81f1310eaabe5698a3d3b5dfa59ce79
Author: Kjell Ahlstedt <kjellahlstedt gmail com>
Date:   Mon Aug 22 20:06:05 2022 +0200

    CI: Accept use of deprecated gtk functions
    
    Don't use warnings=fatal.

 .gitlab-ci.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 14726433..f5dfd3c9 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -131,7 +131,7 @@ release_gcc_build:
     - cp -r installdir/usr /
     - mkdir _build && cd _build
     # -Ddebug=false + -Doptimization=3 correspond to -Dbuildtype=release
-    - meson --prefix=/usr --libdir=lib -Ddebug=false -Doptimization=3 -Dwarnings=fatal
+    - meson --prefix=/usr --libdir=lib -Ddebug=false -Doptimization=3 -Dwarnings=max
     - meson compile
     # Some tests fail with
     #   Unable to init Broadway server: Could not connect: No such file or directory
@@ -155,7 +155,7 @@ release_clang_build:
     - cp -r installdir/usr /
     - mkdir _build && cd _build
     # -Ddebug=false + -Doptimization=3 correspond to -Dbuildtype=release
-    - CC=clang CXX=clang++ meson --prefix=/usr --libdir=lib -Ddebug=false -Doptimization=3 -Dwarnings=fatal
+    - CC=clang CXX=clang++ meson --prefix=/usr --libdir=lib -Ddebug=false -Doptimization=3 -Dwarnings=max
     - meson compile
     # See comment in the release_gcc_build job.
     # - meson test