Update com.saaspose.pdf.Converter.java

Converter Convert didnt work, now method is same as words.Converter.Convert.

In Eclipse i got the message for pdf.Converter.Convert: The method Convert(String, SaveFormat) in the type Converter is not applicable for the arguments (String, SaveFormat)

the example code doesnt work either:

		            com.saaspose.pdf.Converter converter = new com.saaspose.pdf.Converter("input.pdf");
		            //save in the required format
		            converter.Convert("c:\\tempfiles\\output.tiff", com.saaspose.pdf.SaveFormat.TIFF);