fix(changelog): move entry to internal

Author: pichlermarc

CHANGELOG.md

@@ -14,13 +14,13 @@ For experimental package changes, see the [experimental CHANGELOG](experimental/
 ### :bug: (Bug Fix)
 
 * fix(sdk-trace-base): ensure attribute value length limit is enforced on span creation [#4417](https://github.com/open-telemetry/opentelemetry-js/pull/4417) @pichlermarc
-* refactor(core): drop unnecessary assignment of HOSTNAME [#4421](https://github.com/open-telemetry/opentelemetry-js/pull/4421) @pichlermarc
 
 ### :books: (Refine Doc)
 
 ### :house: (Internal)
 
 * chore(opentelemetry-context-zone-peer-dep): support zone.js ^v0.13.0 [#4320](https://github.com/open-telemetry/opentelemetry-js/pull/4320)
+* refactor(core): drop unnecessary assignment of HOSTNAME [#4421](https://github.com/open-telemetry/opentelemetry-js/pull/4421) @pichlermarc
 
 ## 1.20.0