Outdated Documentation

The documentation pages (e.g. https://swiftpackageindex.com/apple/swift-distributed-tracing/1.3.1/documentation/tracing/traceyourapplication#Introducing-Trace-Spans) mention https://github.com/apple/swift-distributed-tracing-extras.git in a number of places. These should be migrated to the Otel libraries now that the extras library is archived

Start by searching the documentation pages for references to swift-distributed-tracing-extras.git, including the linked Trace Your Application page. Replace those references with the appropriate Otel libraries and verify that the documentation no longer directs readers to the archived extras library.

Written by the indexing model from the issue text.