Replace 'adapters' to 'adaptors' in TRPL book
Replace 'adapters' to 'adaptors' in TRPL book

Regarding #29063: Replace 'iterator adapters' appearances to
'iterator adaptors', thus embracing the terminology used along the
API docs and achieving consistency between both sources.

graydon/rust,aidancully/rust,GBGamer/rust,GBGamer/rust,graydon/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,GBGamer/rust,graydon/rust,GBGamer/rust,GBGamer/rust,GBGamer/rust,GBGamer/rust,GBGamer/rust