Finalize 8.16.0 changelog (#2403)

Finalize 8.16.0 changelog

CHANGELOG.md

@@ -3,6 +3,35 @@
 # CHANGELOG
 All notable changes to this project will be documented in this file based on the [Keep a Changelog](http://keepachangelog.com/) Standard. This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [8.16.0](https://github.com/elastic/ecs/compare/v8.11.0...v8.16.0)
+
+### Schema Changes
+
+#### Bugfixes
+* Fix broken link in docs for vulnerability.id. #2328
+
+#### Added
+
+* Added `volume.*` as beta field set. #2269
+* Advanced `process.env_vars` to GA. #2315
+* Advanced `process.io` and `process.tty` fields to GA. #2317
+* Added `threat.indicator.id`. #2324
+* Added `process.group` to generated schemas. #2335
+
+#### Improvements
+
+* Define base encoding of `x509.serial_number`. #2383
+
+### Tooling and Artifact Changes
+
+#### Bugfixes
+
+* Fix broken link for vulnerabilty.id #2328
+
+#### Added
+
+* Documentation in README.md providing instruction on contributions to ECS during the OTel donation #2325
+
 ## [8.11.0](https://github.com/elastic/ecs/compare/v8.10.0...v8.11.0)
 
 ### Schema Changes

CHANGELOG.next.md

@@ -32,35 +32,6 @@ Thanks, you're awesome :-) -->
 
 #### Deprecated
 
-## 8.16.0 (Feature Freeze)
-
-### Schema Changes
-
-#### Bugfixes
-* Fix broken link in docs for vulnerability.id. #2328
-
-#### Added
-
-* Added `volume.*` as beta field set. #2269
-* Advanced `process.env_vars` to GA. #2315
-* Advanced `process.io` and `process.tty` fields to GA. #2317
-* Added `threat.indicator.id`. #2324
-* Added `process.group` to generated schemas. #2335
-
-#### Improvements
-
-* Define base encoding of `x509.serial_number`. #2383
-
-### Tooling and Artifact Changes
-
-#### Bugfixes
-
-* Fix broken link for vulnerabilty.id #2328
-
-#### Added
-
-* Documentation in README.md providing instruction on contributions to ECS during the OTel donation #2325
-
 <!-- All empty sections:
 
 ## Unreleased