Upgrade package version to 2.3.0-pre.2 (#478)

com.unity.formats.alembic/CHANGELOG.md

@@ -4,6 +4,11 @@ All notable changes to this package 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).
 
+## [2.3.0-pre.2] - 2021-09-02
+### Added
+### Changed
+### Fixed
+
 ## [2.3.0-pre.1] - 2021-07-11
 ### Added
 - Added support for importing the cage mesh of SubD Alembic nodes.

com.unity.formats.alembic/package.json

@@ -15,5 +15,5 @@
   ],
   "name": "com.unity.formats.alembic",
   "unity": "2019.4",
-  "version": "2.3.0-pre.1"
+  "version": "2.3.0-pre.2"
 }