add @mzjp2 to credits for ABSStore

Author: alimanfoo

docs/release.rst

@@ -10,7 +10,8 @@ Enhancements
 ~~~~~~~~~~~~
 
 * New storage backend, backed by Azure Blob Storage, class :class:`zarr.storage.ABSStore`.
-  All data is stored as block blobs. By :user:`Shikhar Goenka <shikarsg>` and :user:`Tim Crone <tjcrone>`, :issue:`345`.
+  All data is stored as block blobs. By :user:`Shikhar Goenka <shikarsg>`, 
+  :user:`Tim Crone <tjcrone>` and :user:`Zain Patel <mzjp2>`; :issue:`345`.
 
 * Add "consolidated" metadata as an experimental feature: use
   :func:`zarr.convenience.consolidate_metadata` to copy all metadata from the various