build: Specify check kwarg in run_command

Meson now warns that the default will change in a future version,
so set it explicitly to maintain the existing behavior (and shut
up the meson warning).

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2350>

subprojects/extensions-app/meson.build

@@ -6,7 +6,9 @@ project('gnome-extensions-app',
 
 if get_option('profile') == 'development'
   profile = '.Devel'
-  vcs_tag = run_command('git', 'rev-parse', '--short', '@').stdout().strip()
+  vcs_tag = run_command('git', 'rev-parse', '--short', '@',
+    check: false,
+  ).stdout().strip()
 else
   profile = ''
   vcs_tag = ''