Fixed bug where decimal becomes , instead of .

Tomlet/Models/TomlDouble.cs

@@ -32,7 +32,7 @@ public TomlDouble(double value)
             {IsInfinity: true} => double.IsPositiveInfinity(Value) ? "inf" : "-inf",
             {IsNaN: true} => "nan",
             {HasDecimal: true} => Value.ToString(CultureInfo.InvariantCulture),
-            _ => $"{Value:F1}" //When no decimal, force a decimal point (.0) to force any consuming tools (including ourselves!) to re-parse as float.
+            _ => Value.ToString("F1", CultureInfo.InvariantCulture) //When no decimal, force a decimal point (.0) to force any consuming tools (including ourselves!) to re-parse as float.
         };
 
         public override string SerializedValue => StringValue;