Release Notes - C++ Driver - Version 3.8.1

Bug

• [CXX-2295] - [ChangeStream] options::change_stream::start_at_operation_time accept uses internal bsoncxx::types::b_timestamp in API
• [CXX-2726] - Do not override CMAKE_BUILD_TYPE for multi-config generators

New Feature

Improvement

• [CXX-2480] - Update docs.mongodb.com links in source, API & Reference documentation