You can update an Asset StoreA growing library of free and commercial assets created by Unity and members of the community. Offers a wide variety of assets, from textures, models and animations to whole project examples, tutorials and Editor extensions. More info
See in Glossary package in the Package Manager window:
Open the Package Manager window and select My Assets from the PackagesPackages are collections of assets to be shared and re-used in Unity. The Unity Package Manager (UPM) can display, add, and remove packages from your project. These packages are native to the Unity Package Manager and provide a fundamental method of delivering Unity functionality. However, the Unity Package Manager can also display Asset packages that you downloaded from the Asset Store. More info
See in Glossary drop-down menu.
An arrow indicator appears next to any Asset Store packages that have updates available.
In the list of packages, click the expander icon to the left of the Asset Store package’s name.
The newer version appears under the installed version.
Select the new version for the current Asset Store package and see the details specific to that version in the details view.
Click the Update button.
When the progress bar finishes, the new Asset Store package version information appears in the details view, and is immediately available.