[3.11] gh-101440: fix json snippet error in logging-cookbook.rst (GH-101439) (GH-101463)



(cherry picked from commit 20c11f2e600e1c0bf42de4d6f2fb3ce5ccc2587c)

Co-authored-by: Peter Jiping Xie <peter.jp.xie@gmail.com>

Automerge-Triggered-By: GH:hugovk