minor #1474 Update installation.rst (soatok)
minor #1474 Update installation.rst (soatok)

This PR was merged into the 1.16-dev branch.

Discussion
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Update installation.rst

Refer to PGP signature verification in the installation instructions for tarballs.

Commits
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3c48cb1 Update installation.rst

framewr/Twig,derickr/Twig,dkarvounaris/Twig,jamessingizi/Twig,nicolas-grekas/Twig,iKwinto/Twig,Rvanlaak/Twig,hhamon/Twig,twigphp/Twig,hason/Twig,hhamon/Twig,robregonm/Twig,craue/Twig,fsw/Twig,moufmouf/Twig,hason/Twig,huang53798584/Twig,huang53798584/Twig,derickr/Twig,framewr/Twig,znerol/Twig,jamessingizi/Twig,apishka/templater,iKwinto/Twig,Rvanlaak/Twig,moltin/Twig,gamernetwork/Twig,gencer/Twig,Tobion/Twig,Tobion/Twig,hhamon/Twig,derickr/Twig,nicolas-grekas/Twig,bocharsky-bw/Twig,huang53798584/Twig,Tobion/Twig,twigphp/Twig,dkarvounaris/Twig,fsw/Twig,nicolas-grekas/Twig,znerol/Twig,gamernetwork/Twig,hason/Twig,gencer/Twig,moufmouf/Twig,nicolas-grekas/Twig,nicolas-grekas/Twig,twigphp/Twig,dkarvounaris/Twig,apishka/templater,loi-chuanoi/Twig,iKwinto/Twig,framewr/Twig,znerol/Twig,moufmouf/Twig,robregonm/Twig,Rvanlaak/Twig,fsw/Twig,moltin/Twig,craue/Twig,robregonm/Twig,bocharsky-bw/Twig,gamernetwork/Twig,moltin/Twig,bocharsky-bw/Twig,jamessingizi/Twig