Update affiliation in pyhep.md (#1886)

Author: veprbl

_activities/pyhep.md

@@ -12,7 +12,7 @@ the sharing of knowledge and expertise. It embraces the broad community, from HE
 
 - Peter Fackeldey (CMS and IRIS-HEP, Princeton)
 - Alexander Heidelbach (Belle II, LMU Munich)
-- Dmitry Kalinkin (STAR, BNL)
+- Dmitry Kalinkin (ePIC, BNL)
 
 All coordinators can be reached at <hsf-pyhep-organisation@googlegroups.com>.