Merge #1266 (update pytz to 2022.6)

Author: martey

requirements/production.txt

@@ -15,6 +15,6 @@ pinax-eventlog==5.1.1
 pip==22.3.1
 -e git+https://github.com/pretalx/pretalx@9b0934c0cef6ec022608ff19ab15176528dac345#egg=pretalx[redis]&subdirectory=src
 psycopg2==2.9.4
-pytz==2022.5
+pytz==2022.6
 sentry-sdk==1.11.1
 virtualenv==20.17.0