Update pyhep.md

Author: ianna

_activities/pyhep.md

@@ -11,7 +11,7 @@ the sharing of knowledge and expertise. It embraces the broad community, from HE
 # Conveners
 
 * Eduardo Rodrigues (LHCb, University of Liverpool)
-* Jim Pivarski (CMS and IRIS-HEP, Princeton)
+* Ianna Osborne (CMS and IRIS-HEP, Princeton)
 * Matthew Feickert (ATLAS and IRIS-HEP, University of Wisconsin-Madison)
 * Nikolai Hartmann (Belle II, LMU Munich)