[Light Switch] Fixed issue where number boxes in select location dialog were sometimes not updating (#43514)

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fix/what does it change/how was it tested (even manually, if necessary)?
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## Summary of the Pull Request
Ensure that even if the user enters the same values the correct buttons
are enabled and the dialog shows the correct info.

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## PR Checklist

- [x] Closes: #43511
- [x] **Communication:** I've discussed this with core contributors
already. If the work hasn't been agreed, this work might be rejected
- [x] **Localization:** All end-user-facing strings can be localized

src/settings-ui/Settings.UI/ViewModels/LightSwitchViewModel.cs

@@ -562,7 +562,7 @@ namespace Microsoft.PowerToys.Settings.UI.ViewModels
 
                 SyncButtonInformation = SelectedCity != null
                     ? SelectedCity.City
-                    : $"{Latitude},{Longitude}";
+                    : $"{Latitude}°,{Longitude}°";
 
                 double lat = double.Parse(ModuleSettings.Properties.Latitude.Value, CultureInfo.InvariantCulture);
                 double lon = double.Parse(ModuleSettings.Properties.Longitude.Value, CultureInfo.InvariantCulture);