xwayland-grab-keyboard: Switch to g_pattern_spec_match_string()

The g_pattern_match_string() variant is deprecated, switch to the
properly namespaced one.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1941>

src/wayland/meta-xwayland-grab-keyboard.c

@@ -182,8 +182,8 @@ application_is_in_pattern_array (MetaWindow *window,
     {
       GPatternSpec *pattern = (GPatternSpec *) g_ptr_array_index (pattern_array, i);
 
-      if (g_pattern_match_string (pattern, class) ||
-          g_pattern_match_string (pattern, name))
+      if (g_pattern_spec_match_string (pattern, class) ||
+          g_pattern_spec_match_string (pattern, name))
         return TRUE;
     }