add shortcuts for 'stable' and 'latest' to docs (#4138)
add shortcuts for 'stable' and 'latest' to docs (#4138)

* add shortcuts for 'stable' and 'latest' to docs

* fix

* handle stable and latest better

* only setup ssh and configure git in main repo

Co-authored-by: Dirk Groeneveld <b073420333c2c092702568e29c33453b1b3fc728@allenai.org>
allenai/allennlp,allenai/allennlp,allenai/allennlp,allenai/allennlp