Update of dates for Eduardo and Jim

Author: eduardo-rodrigues

_activities/pyhep.md

@@ -290,8 +290,8 @@ The event was kindly sponsored by
 
 
 # Previous conveners
-- Jim Pivarski (CMS and IRIS-HEP, Princeton), - 2025
-- Eduardo Rodrigues (LHCb, University of Liverpool), - 2024
+- Jim Pivarski (CMS and IRIS-HEP, Princeton), 2019-2024
+- Eduardo Rodrigues (LHCb, University of Liverpool), 2018-2024
 - Oksana Shadura (IRIS-HEP, University of Nebraska), 2022-2023
 - Ben Krikler (LZ, CMS), 2019-2021
 - Chris Tunnell (XENON1T), 2019