Enable TwoWay binding for MaxSuggestions NumberBox

Changed NumberBox binding for Settings.MaxSuggestions from OneWay to TwoWay, allowing user input in the UI to update the underlying setting. This ensures changes made by users are saved back to the settings model.

Author: Jack251970

Plugins/Flow.Launcher.Plugin.WebSearch/SettingsControl.xaml

@@ -164,7 +164,7 @@
                     SpinButtonPlacementMode="Compact"
                     ValidationMode="InvalidInputOverwritten"
                     ValueChanged="NumberBox_ValueChanged"
-                    Value="{Binding Settings.MaxSuggestions, Mode=OneWay}" />
+                    Value="{Binding Settings.MaxSuggestions, Mode=TwoWay}" />
             </StackPanel>
             <CheckBox
                 Name="EnableSuggestion"