pass DateTimeFormatInfo.CurrentInfo here instead of suppressing the warning

fixes 5ae15c8

src/BizHawk.Common/PropertyGridConverters/BizDateTimeConverter.cs

@@ -9,10 +9,8 @@ namespace BizHawk.Common
 		public override object ConvertTo(ITypeDescriptorContext? context, CultureInfo? culture, object? value, Type destinationType)
 		{
 			if (value is not DateTime d || destinationType != typeof(string)) throw new NotSupportedException("can only do DateTime --> string");
-#pragma warning disable CA1305
 			// this function is explicitly supposed to be locale dependent
-			return d.ToString();
-#pragma warning restore CA1305
+			return d.ToString(DateTimeFormatInfo.CurrentInfo);
 		}
 	}
 }