release v0.5.1 (#311)

* release date

* fix up the changelog entry

* [skip-ci]

Author: keewis

docs/whats-new.rst

@@ -2,11 +2,12 @@
 
 What's new
 ==========
-0.5.1 (*unreleased*)
---------------------
+0.5.1 (10 Aug 2025)
+-------------------
 - Pass ``sel`` options to the wrapped array (:pull:`304`, :issue:`303`)
   By `Bhavin Patel <https://github.com/bpatel2107>`_.
 - Support python 3.13 (:pull:`310`)
+  By `Justus Magin <https://github.com/keewis>`_.
 
 0.5 (09 Jun 2025)
 ------------------