Fix to type of parameter

Author: marghe-molaro

src/tlo/methods/collect_event_chains.py

@@ -52,7 +52,7 @@ def read_parameters(self, resourcefilepath: Optional[Path] = None):
 
         # If modules of interest is '*', set by default to all modules included in the simulation
         if self.parameters["modules_of_interest"] == ['*']:
-            self.parameters["modules_of_interest"] = self.sim.modules.keys()
+            self.parameters["modules_of_interest"] = list(self.sim.modules.keys())
 
     def initialise_population(self, population):
         pass