[PWGHF] Add task of net charm fluctuations (#15981)

Co-authored-by: ALICE Action Bot <alibuild@cern.ch>

Author: zhangbiao-phy

PWGHF/D2H/Tasks/CMakeLists.txt

@@ -119,6 +119,11 @@ o2physics_add_dpl_workflow(task-lc-to-k0s-p
                     PUBLIC_LINK_LIBRARIES O2Physics::AnalysisCore
                     COMPONENT_NAME Analysis)
 
+o2physics_add_dpl_workflow(task-net-charm-fluctuations
+                    SOURCES taskNetCharmFluctuations.cxx
+                    PUBLIC_LINK_LIBRARIES O2Physics::AnalysisCore O2Physics::EventFilteringUtils
+                    COMPONENT_NAME Analysis)
+
 o2physics_add_dpl_workflow(task-omegac0-to-omega-pi
                     SOURCES taskOmegac0ToOmegaPi.cxx
                     PUBLIC_LINK_LIBRARIES O2Physics::AnalysisCore