update changelog

Author: rickeylev

CHANGELOG.md

@@ -73,6 +73,8 @@ END_UNRELEASED_TEMPLATE
   ([#3085](https://github.com/bazel-contrib/rules_python/issues/3085)).
 * (toolchains) local toolchains now tell the `sys.abiflags` value of the
   underlying runtime.
+* (performance) 90% reduction in py_binary/py_test analysis phase cost.
+  ([#3381](https://github.com/bazel-contrib/rules_python/pull/3381)).
 
 {#v0-0-0-added}
 ### Added