fix trove classifier (#4324)

bjlittle · web-flow · commit ba77f5d08f33 · 2021-09-17T08:41:30.000+01:00
diff --git a/docs/src/whatsnew/3.1.rst b/docs/src/whatsnew/3.1.rst
@@ -1,6 +1,6 @@
 .. include:: ../common_links.inc
 
-v3.1 (16 Sep 2021)
+v3.1 (17 Sep 2021)
 ******************
 
 This document explains the changes made to Iris for this release
diff --git a/setup.cfg b/setup.cfg
@@ -2,7 +2,7 @@
 author = SciTools Developers
 author_email = scitools-iris-dev@googlegroups.com
 classifiers =
-    Development Status :: 5 Production/Stable
+    Development Status :: 5 - Production/Stable
     Intended Audience :: Science/Research
     License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)
     Operating System :: MacOS
