doc: update copyright date

diff --git a/doc/conf.py b/doc/conf.py
index e23cb7d7fb444964cb341269771629713f8c2d2e..7ac13a5d7fb5dc71de4caa824e11feefce090409 100644 (file)
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -16,7 +16,7 @@ master_doc = 'index'
 
 # General information about the project.
 project = u'notmuch'
-copyright = u'2009-2022, Carl Worth and many others'
+copyright = u'2009-2023, Carl Worth and many others'
 
 location = os.path.dirname(__file__)