fix(changelog): clean up, move entries to breaking

CHANGELOG.md

@@ -19,8 +19,6 @@ For experimental package changes, see the [experimental CHANGELOG](experimental/
 
 ## 1.18.0
 
-### :boom: Breaking Change
-
 ### :rocket: (Enhancement)
 
 * feat(metrics): prototype experimental advice support [#3876](https://github.com/open-telemetry/opentelemetry-js/pull/3876) @legendecas
@@ -29,8 +27,6 @@ For experimental package changes, see the [experimental CHANGELOG](experimental/
 
 * fix(core): remove re-export of `version.ts` [#4225](https://github.com/open-telemetry/opentelemetry-js/pull/4225) @david-luna
 
-### :books: (Refine Doc)
-
 ### :house: (Internal)
 
 * chore: track package-lock.json [#4238](https://github.com/open-telemetry/opentelemetry-js/pull/4238) @legendecas

experimental/CHANGELOG.md

@@ -18,10 +18,10 @@ All notable changes to experimental packages in this project will be documented
 
 ### :boom: Breaking Change
 
-* fix(sdk-node): remove the explicit dependency on @opentelemetry/exporter-jaeger that was kept on the previous release
+* fix(sdk-node)!: remove the explicit dependency on @opentelemetry/exporter-jaeger that was kept on the previous release
   * '@opentelemetry/exporter-jaeger' is no longer be a dependency of this package. To continue using '@opentelemetry/exporter-jaeger', please install it manually.
     * NOTE: `@opentelemetry/exporter-jaeger` is deprecated, consider switching to one of the alternatives described [here](https://www.npmjs.com/package/@opentelemetry/exporter-jaeger)
-* fix(otlp-transformer): OTLP json encoding [#4220](https://github.com/open-telemetry/opentelemetry-js/pull/4220) @seemk
+* fix(otlp-transformer)!: OTLP json encoding [#4220](https://github.com/open-telemetry/opentelemetry-js/pull/4220) @seemk
   * Fixes a bug in the OTLP (http/json) exporters where timestamps were not encoded as strings, causing the export to
     be rejected by OTLP endpoints