Fix a typo in dataset.py (pydata#11181)

* Fix a typo in dataset.py

* change whats-new.rst

* Update whatsnew

---------

Co-authored-by: Nick Hodgskin <36369090+VeckoTheGecko@users.noreply.github.com>

Author: yaochengchen

doc/whats-new.rst

@@ -43,17 +43,12 @@ Bug Fixes
 Documentation
 ~~~~~~~~~~~~~
 
-- Fix a typo in ``xarray/doc/user-guide/reshaping.rst`` (:pull:`11186`).
-- Fix a typo in ``xarray/core/dataarray.py`` (:pull:`11185`).
+- Fix typos (:pull:`11180`, :pull:`11181`, :pull:`11182`, :pull:`11185`, :pull:`11186`).
   By `Yaocheng Chen <https://github.com/yaochengchen>`_.
 
 Internal Changes
 ~~~~~~~~~~~~~~~~
 
-- Fix a typo in ``xarray/core/variable.py`` (:pull:`11182`).
-- Fix a typo in ``xarray/backends/api.py`` (:pull:`11180`).
-  By `Yaocheng Chen <https://github.com/yaochengchen>`_.
-
 - Add stubtest configuration and allowlist for validating type annotations against
   runtime behavior. This enables CI integration for type stub validation and helps
   prevent type annotation regressions (:issue:`11086`).

xarray/core/dataset.py

@@ -10443,7 +10443,7 @@ def coarsen(
             User guide describing :py:func:`~xarray.Dataset.coarsen`
 
         :ref:`compute.coarsen`
-            User guide on block arrgragation :py:func:`~xarray.Dataset.coarsen`
+            User guide on block aggregation :py:func:`~xarray.Dataset.coarsen`
 
         :doc:`xarray-tutorial:fundamentals/03.3_windowed`
             Tutorial on windowed computation using :py:func:`~xarray.Dataset.coarsen`