Update _posts/2019-05-02-zarr-2.3-release.md

Co-Authored-By: alimanfoo <[email protected]>

Author: jakirkham

_posts/2019-05-02-zarr-2.3-release.md

@@ -21,7 +21,7 @@ Python dictionaries (`dict`) implement. The simplicity of this
 interface means it is relatively straightforward to add support for a
 range of different storage systems. The 2.3 release adds support for
 storage using [SQLite]( https://zarr.readthedocs.io/en/stable/api/storage.html#zarr.storage.SQLiteStore ), [Redis]( https://zarr.readthedocs.io/en/stable/api/storage.html#zarr.storage.RedisStore ), [MongoDB]( https://zarr.readthedocs.io/en/stable/api/storage.html#zarr.storage.MongoDBStore ) and
-[Azure Blob Storage](@@TODO).
+[Azure Blob Storage]( https://zarr.readthedocs.io/en/stable/api/storage.html#zarr.storage.ABSStore ).
 
 For example, here's code that stores an array using Redis: