Summary:
Recent PR by alloy adds `s.cocoapods_version`. That makes `release script` also modify that value. Adding `\` makes `sed` match on a dot character (I believe missing `\` was a mistake).
Used and tested here: https://github.com/facebook/react-native/commits/0.42-stable
CC bestander
Closes https://github.com/facebook/react-native/pull/12381
Differential Revision: D4558370
Pulled By: bestander
fbshipit-source-id: 3bee7bac3002c0c83c100ce9d0c67463e030a428
096acbd53d