Bump versions for patch release. (#393)

* Bump versions for patch release.

* Update CHANGELOG.md

Author: vickycl

package/com.unity.formats.usd/CHANGELOG.md

@@ -1,11 +1,19 @@
 # Changes in usd-unity-sdk for Unity
 
-## Unreleased
+## [3.0.0-exp.4] - 2023-06-21
+### Features
+- Added EditorAnalytics to track internally which features are most used.
+
+### Bug Fixes
+- Fixed the Samples Assembly Definitions compile errors.
 
-## [3.0.0-exp.3] - 2023-05-11
+### Changed
+- Updated AppCollector YAML file to reflect latest info.
+- We've removed the USD logo in a few places until we have a formal agreement in place to use it.
+
+## [3.0.0-exp.3] - 2023-06-20
 ### Features
 - The USD Recorder now has an option to export transform overrides.
-- Added EditorAnalytics to track internally which features are most used.
 
 ### Bug Fixes
 - "Export Transform Override" now properly exports modified transforms only.
@@ -28,8 +36,6 @@
 - Disabled plugins on unsupported platforms.
 - Optimized triangulation to reduce the chance of a "Timed out while waiting for thread" error on importing a complex mesh.
 - Optimized PointInstance importing.
-- Updated AppCollector YAML file to reflect latest info.
-- We've removed the USD logo in a few places until we have a formal agreement in place to use it.
 
 ## [3.0.0-exp.2] - 2021-09-29
 ### Features

package/com.unity.formats.usd/package.json

@@ -30,5 +30,5 @@
         "url": "https://github.com/Unity-Technologies/usd-unity-sdk.git"
     },
     "unity": "2019.4",
-    "version": "3.0.0-exp.3"
+    "version": "3.0.0-exp.4"
 }