Change pipe on moderndive.com

[rudeboybert]

for first edition on moderndive.com from %>% to |>?

[ismayc]

Hmm, I'm not so sure if we want to go down that path of updating the first edition. Feels like we'd have to keep track of a few too many different things? I'd prefer to update the second and then point people there to the discussion on the two pipes?