1.17.15

[1.17.15] - 2021-03-23

• Fixed FileNotFoundException when using bundle naming mode "Filename" with Unity Cloud Build.
• Fixed a bug where LoadAssetsAsync handle Completed callback is invoked before all individual Asset callbacks.
• Added in Asset validator on Editor startup. This ensures that assets deleted when the editor was closed are removed from Addressables.
• Fixed bug where the current amount of downloaded bytes was not properly updated