Move `docbook_updateOutputFilePdf.sh' from `help' functionality to
`render' functionality as `docbook_convertToPdf.sh':
- This action takes a DocBook file as input which is an XML-base
file and produces a Pdf file. Rendition of XML files is
organized inside `render' functionality not `help'. If you need
to produce Pdf from DocBook inside `help' functionality, make a
call to `render' functionality instead.