Increase macOS pixel rollout to 100%. (duckduckgo#2430)

Author: samsymons

overrides/macos-override.json

@@ -1084,6 +1084,9 @@
                             },
                             {
                                 "percent": 50
+                            },
+                            {
+                                "percent": 100
                             }
                         ]
                     }