Fix whats-new for 2023.02.0 (#7506)

* fix

* Update doc/whats-new.rst

* Update whats-new

* fix.

Author: dcherian

doc/whats-new.rst

@@ -17,13 +17,13 @@ What's New
 
 .. _whats-new.2023.02.0:
 
-v2023.02.0 (Feb 7. 2023)
+v2023.02.0 (Feb 7, 2023)
 ------------------------
 
-This release brings a major upgrade to :py:func:`xarray.concat`, bug fixes and
-a bump in supported dependency versions. Thanks to our 9 contributors:
+This release brings a major upgrade to :py:func:`xarray.concat`, many bug fixes,
+and a bump in supported dependency versions. Thanks to our 11 contributors:
 Aron Gergely, Deepak Cherian, Illviljan, James Bourbeau, Joe Hamman,
-Justus Magin, Kai Mühlbauer, Ken Mankoff, Spencer Clark.
+Justus Magin, Hauke Schulz, Kai Mühlbauer, Ken Mankoff, Spencer Clark, Tom Nicholas.
 
 Breaking changes
 ~~~~~~~~~~~~~~~~