[R] Add recipe for updating a schema

i.e. as per the answers to https://stackoverflow.com/questions/74264044/rarrow-10-0-bug-when-using-gsub

Start by reading the linked Stack Overflow answers and reviewing the existing R recipes in the Apache Arrow Cookbook. Add a recipe that documents how to update a schema, using the referenced guidance as the expected behavior, and verify that the example is clear and reproducible.

Written by the indexing model from the issue text.