Links to readings broken

Links to previous (and missing?) sections are broken. From the minesweeper project, these links result in a Not found message + a redirect. The first two I believe should point to previous sections under Full Stack Online - Ruby/Git, but the latter doesn’t seem to have a corresponding reading/exercise and seems to be a hole in the curriculum.

https://www.aaonline.io/full-stack-online-ruby/1/serialization-json-and-yaml
https://www.aaonline.io/full-stack-online-ruby/1/fixing-git-commit-authorship
https://www.aaonline.io/full-stack-online-ruby/1/inspecting-complex-elements

Thank you for pointing this bug out. Changes made to the task urls caused these to break and we will be adjusting the curriculum accordingly as soon as possible. :nerd_face: