Update convert_encoding.rst
Update convert_encoding.rst

The arguments were in incorrect order. The first should be `to` and the second should be `from` - just like the text describes it.
huang53798584/Twig,Rvanlaak/Twig,hhamon/Twig,bocharsky-bw/Twig,Tobion/Twig,robregonm/Twig,znerol/Twig,craue/Twig,hason/Twig,craue/Twig,dkarvounaris/Twig,robregonm/Twig,nicolas-grekas/Twig,moufmouf/Twig,huang53798584/Twig,gencer/Twig,gamernetwork/Twig,jamessingizi/Twig,framewr/Twig,derickr/Twig,gamernetwork/Twig,dkarvounaris/Twig,hason/Twig,Rvanlaak/Twig,Tobion/Twig,framewr/Twig,moltin/Twig,gencer/Twig,huang53798584/Twig,dkarvounaris/Twig,bocharsky-bw/Twig,nicolas-grekas/Twig,iKwinto/Twig,moufmouf/Twig,fsw/Twig,derickr/Twig,apishka/templater,loi-chuanoi/Twig,twigphp/Twig,twigphp/Twig,iKwinto/Twig,hhamon/Twig,Rvanlaak/Twig,hason/Twig,znerol/Twig,twigphp/Twig,iKwinto/Twig,derickr/Twig,moltin/Twig,fsw/Twig,apishka/templater,nicolas-grekas/Twig,moufmouf/Twig,bocharsky-bw/Twig,hhamon/Twig,gamernetwork/Twig,znerol/Twig,robregonm/Twig,nicolas-grekas/Twig,framewr/Twig,fsw/Twig,nicolas-grekas/Twig,jamessingizi/Twig,jamessingizi/Twig,Tobion/Twig,moltin/Twig