doc/conf.py: update copyright to 2022
Update copyright time frame.
Signed-off-by: Dan Kalowsky <dank@deadmime.org>
diff --git a/doc/conf.py b/doc/conf.py
index aa385f3..701b511 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -36,7 +36,7 @@
# -- Project --------------------------------------------------------------
project = "Zephyr Project"
-copyright = "2015-2021 Zephyr Project members and individual contributors"
+copyright = "2015-2022 Zephyr Project members and individual contributors"
author = "The Zephyr Project Contributors"
# parse version from 'VERSION' file
