Update README.md

Author: kevinivek

README.md

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 # MarrowSDK
 
 To Setup the SDK, check out [the wiki](https://github.com/StressLevelZero/MarrowSDK/wiki/ProjectSetup).
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+# Changelog
+
+## [0.6.0]
+
+### Added
+
+- Zone, ZoneLink
+- ZoneItems: ZoneEvents, ZoneLoadLevel
+- ZoneLinkItems: ZoneAmbience, ZoneMusic, ZoneChunkLoader
+- ZoneCuller, SceneChunk
+- DataCard
+- DataCards: BoneTag and MonoDisc
+- Pallet Dependencies
+- PreviewMesh and MonoDisc loading in the editor for previewing content from built external pallets
+- CrateSpawner (Replacing SpawnableCratePlacer)
+- Zone Creation/Linking Overlay (Spacebar in sceneview to enable)
+- Added Normal Map Encoding and Lightmap Encoding rules to Marrow Project Validation
+- Added URP Quality Settings and Shader Import rules to Marrow Project Validation
+- AudioReverbData, used in ZoneAmbience (use these instead of Unity's Reverb Zones)
+- AssetWarehouse Reload button, hit this bad boy anytime you think the AssetWarehouse might be out of sync!
+- Getting Started Window
+
+### Changed
+
+- Updated to Unity Version 2021.3.16f1
+- Marrow Project Validation fully automatic, will run on its own now, no longer a manual step
+- New smoother workflow from package installation to creating Pallets and LevelCrates
+- Updated URP/Core dependencies
+- Smoother package installation/updating using Scoped Registries (Remove all current SDK/URP packages in the package manager for best results)
+- All SDK related components are now sorted in the Add Component Menu under MarrowSDK
+- External Pallets are now loaded into memory using the Add Pallet Dependency button on the Pallet (Delete any External Pallets that were previously imported into your project)
+- Addressables re-work to load bundles more dynamically
+- Smoother AssetWarehouse window User Experience
+
+### Fixed
+
+- AssetWarehouse now recovers after exiting Playmode
+- Addressables breaking after building
+- Proper AssetWarehouse asynchronus reloading
+- Various issues with Marrow Project Validation
+- Platform now restores after you do a build for a different platform
+
+### Known Issues
+- Skybox will render as black
+- Layers may appear to be missing (The layers will still work properly, needs to be added to Marrow Project Validation)
+- Custom Spawnables unsupported
+- CrateSpawner Title not changing properly