Update .documentup.json

testing if I have to change master branch to work this conf.
Revert "Update .documentup.json"

This reverts commit d805de6d1836fedc45bd776f3fa3169d8d9247ad.
Fixed link to Git Internals PDF
Merge pull request #7 from jblaine/patch-1

Fixed link to Git Internals PDF
Merge branch 'master' of github.com:skwp/git-workflows-book
Merge branch 'master' into pt_br