update version and changelog

Author: HDembinski

doc/changelog.rst

@@ -5,6 +5,11 @@
 Changelog
 =========
 
+2.21.3 (April 03, 2023)
+-----------------------
+- Fix template input modification bug in template class (`#856 <https://github.com/scikit-hep/iminuit/pull/856>`_)
+- Better docs for limits from annotated model parameters (`#853 <https://github.com/scikit-hep/iminuit/pull/853>`_)
+
 2.21.2 (March 19, 2023)
 -----------------------
 - Fix CITATION.CFF

pyproject.toml

@@ -8,7 +8,7 @@ build-backend = "setuptools.build_meta"
 [project]
 name = "iminuit"
 description = "Jupyter-friendly Python frontend for MINUIT2 in C++"
-version = "2.21.2"
+version = "2.21.3"
 maintainers = [
     { name = "Hans Dembinski" },
     { email = "[email protected]" },