Updated issue template.
Updated issue template.

jmcnamara/XlsxWriter,jkyeung/XlsxWriter,jmcnamara/XlsxWriter,jmcnamara/XlsxWriter,jkyeung/XlsxWriter,jkyeung/XlsxWriter,jkyeung/XlsxWriter,jmcnamara/XlsxWriter