change burlington ruby link! :rainbow: :sparkles:

change burlington ruby link! :rainbow: :sparkles:
Merge branch 'gh-pages' of https://github.com/rails-girls-summer-of-code/summer-of-code into gh-pages
Merge branch 'gh-pages' of https://github.com/rails-girls-summer-of-code/summer-of-code into gh-pages
Merge branch 'gh-pages' of https://github.com/rails-girls-summer-of-code/summer-of-code into gh-pages
add missing image caption to species+ blog post :sparkles: