add changelog entry

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 ## v9.7.0
 
-Version 9.7.0 changes the endpoint used to access the cluster name for Elasticsearch instrumentation and adds support for Falcon.
+Version 9.7.0 changes the endpoint used to access the cluster name for Elasticsearch instrumentation, adds support for Falcon, and removes the creation of the Ruby/Thread and Ruby/Fiber spans.
 
 - **Feature: Use root path to access Elasticsearch cluster name**
 
@@ -22,6 +22,10 @@ Version 9.7.0 changes the endpoint used to access the cluster name for Elasticse
 
   The agent now supports the web server [Falcon](https://socketry.github.io/falcon/). [PR#2383](https://github.com/newrelic/newrelic-ruby-agent/pull/2383)
 
+- **Feature: Remove spans with name Ruby/Thread and Ruby/Fiber**
+
+  Due to the lack of helpful information and the confusion commonly caused by the spans named Ruby/Thread and Ruby/Fiber, these spans have been removed. However, the agents ability to monitor instrumented code running in a thread or fiber will remain unchanged. [PR#2389](https://github.com/newrelic/newrelic-ruby-agent/pull/2389)
+
 ## v9.6.0
 
 Version 9.6.0 adds instrumentation for Async::HTTP, Ethon, and HTTPX, adds the ability to ignore specific routes with Roda, gleans Docker container IDs from cgroups v2-based containers, records additional synthetics attributes, fixes an issue with Rails 7.1 that could cause duplicate log records to be sent to New Relic, fixes a deprecation warning for the Sidekiq error handler, adds additional attributes for OpenTelemetry compatibility, and resolves some technical debt, thanks to the community.