More consistent usage of version option for commands in guides [skip ci]
More consistent usage of version option for commands in guides [skip ci]

In the getting started guide intro section both `-v` and `--version` are used:

    $ ruby -v
    $ sqlite3 --version
    $ node --version
    $ yarn -v
    $ rails --version

Both ruby and yarn support `--version` as well, but sqlite3 does not
support `-v`.

For consistency use `--version` option for `ruby` and `yarn` commands.

tjschuck/rails,Vasfed/rails,rafaelfranca/omg-rails,schuetzm/rails,EmmaB/rails-1,MSP-Greg/rails,bogdanvlviv/rails,kmcphillips/rails,Envek/rails,kmcphillips/rails,joonyou/rails,Erol/rails,starknx/rails,rails/rails,yahonda/rails,betesh/rails,repinel/rails,kddeisz/rails,georgeclaghorn/rails,lcreid/rails,Edouard-chin/rails,joonyou/rails,georgeclaghorn/rails,tjschuck/rails,georgeclaghorn/rails,BlakeWilliams/rails,Erol/rails,EmmaB/rails-1,starknx/rails,kmcphillips/rails,yahonda/rails,kddeisz/rails,rails/rails,yahonda/rails,yalab/rails,vipulnsward/rails,yawboakye/rails,kmcphillips/rails,eileencodes/rails,starknx/rails,repinel/rails,lcreid/rails,EmmaB/rails-1,tgxworld/rails,rails/rails,joonyou/rails,Edouard-chin/rails,lcreid/rails,vipulnsward/rails,tjschuck/rails,esparta/rails,yahonda/rails,Envek/rails,Stellenticket/rails,Stellenticket/rails,vipulnsward/rails,schuetzm/rails,yawboakye/rails,esparta/rails,MSP-Greg/rails,Vasfed/rails,schuetzm/rails,BlakeWilliams/rails,Edouard-chin/rails,repinel/rails,schuetzm/rails,Stellenticket/rails,rafaelfranca/omg-rails,joonyou/rails,kddeisz/rails,rafaelfranca/omg-rails,lcreid/rails,rails/rails,georgeclaghorn/rails,BlakeWilliams/rails,eileencodes/rails,yawboakye/rails,yalab/rails,eileencodes/rails,betesh/rails,Envek/rails,kddeisz/rails,Edouard-chin/rails,eileencodes/rails,yalab/rails,tjschuck/rails,yawboakye/rails,Vasfed/rails,tgxworld/rails,Stellenticket/rails,esparta/rails,MSP-Greg/rails,BlakeWilliams/rails,tgxworld/rails,repinel/rails,esparta/rails,Erol/rails,Envek/rails,bogdanvlviv/rails,Erol/rails,MSP-Greg/rails,vipulnsward/rails,yalab/rails,betesh/rails,betesh/rails,bogdanvlviv/rails,Vasfed/rails,tgxworld/rails,bogdanvlviv/rails