Merge branch '3.1.x'

diff --cc CHANGES.rst
index cfc17e61cd7dccfdd749f2089d3317f10d7e6c7d,9921d6a31072a92961ea8a1b8f3eaa112bb2afcc..788809f907ec2460f709a553b465d86caa31b814
--- 1/CHANGES.rst
--- 2/CHANGES.rst
+++ b/CHANGES.rst
@@@ -1,11 -1,14 +1,20 @@@
  .. currentmodule:: jinja2
  
 +Version 3.2.0
 +-------------
 +
 +Unreleased
 +
 +
+ Version 3.1.1
+ -------------
+ 
+ Released 2022-03-25
+ 
+ -   The template filename on Windows uses the primary path separator.
+     :issue:`1637`
+ 
+ 
  Version 3.1.0
  -------------