Update CHANGELOG.md

Co-authored-by: Bryan Naegele <bryannaegele@users.noreply.github.com>

Author: tsloughter

CHANGELOG.md

@@ -5,13 +5,9 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## 2021-10-12
+## [API 1.0.0-rc.3] - 2021-10-12
 
-### API - 1.0.0-rc.3
-
-#### Tracers
-
-##### Removed
+### Removed
 
 - Removed `opentelemetry:register_application_tracer`. Each application has a
   Tracer registered for it automatically on boot. This can be disabled by