Update release notes for 2.6

Author: Carreau

docs/release.rst

@@ -5,19 +5,35 @@ Release notes
 Next Release
 ------------
 
-This release will be the first release of Zarr not supporting Python 3.5.
+2.6.0
+-----
+
+This release od Zarr Python is is the first release of Zarr to not supporting Python 3.5.
 
 * End Python 3.5 support.
   By :user:`Chris Barnes <clbarnes>`; :issue:`602`.
 
-* Fix ``open_group/open_array`` to allow opening of readonly store with
+* Fix ``open_group/open_array`` to allow opening of read-only store with
   ``mode='r'`` :issue:`269`
 
 * Add `Array` tests for FSStore.
   By :user:`Andrew Fulton <andrewfulton9>`; :issue: `644`.
 
 * fix a bug in which ``attrs`` would not be copied on the root when using ``copy_all``; :issue:`613`
 
+* Fix ``FileNotFoundError``  with dask/s3fs :issue:`649`
+
+* Fix flaky fixture in test_storage.py :issue:`652`
+
+* Fix FSStore getitems fails with arrays that have a 0 length shape dimension :issue:`644`
+
+* Use async to fetch/write result concurrently when possible. :issue:`536`, See `this comment
+  <https://github.com/zarr-developers/zarr-python/issues/536#issuecomment-721253094>`_ for some performance analysis
+  showing order of magnitude faster response in some benchmark.
+
+See `this link <https://github.com/zarr-developers/zarr-python/milestone/11?closed=1>` for the full list of closed and
+merged PR tagged with the 2.6 milestone.
+
 2.5.0
 -----