Fix MauiIcon ForegroundScale on systems with comma as decimal separator

Fixes #11685

Specifying the ForegroundScale with a dot caused an issue on systems
with commas as decimal separators. The image got upscaled instead of
downscaled on those systems because the ForegroundScale was parsed
without passing InvariantCulture as culture info. Because of this,
it only worked on systems with a dot as a decimal separator.

src/SingleProject/Resizetizer/src/ResizeImageInfo.cs

@@ -1,6 +1,7 @@
 #nullable enable
 using System;
 using System.Collections.Generic;
+using System.Globalization;
 using System.IO;
 using Microsoft.Build.Framework;
 using SkiaSharp;
@@ -95,7 +96,7 @@ public static List<ResizeImageInfo> Parse(IEnumerable<ITaskItem> images)
  if (bool.TryParse(image.GetMetadata("IsAppIcon"), out var iai))
  info.IsAppIcon = iai;
 
- if (float.TryParse(image.GetMetadata("ForegroundScale"), out var fsc))
+ if (float.TryParse(image.GetMetadata("ForegroundScale"), NumberStyles.Number, CultureInfo.InvariantCulture, out var fsc))
  info.ForegroundScale = fsc;
 
  var fgFile = image.GetMetadata("ForegroundFile");