Update simvue/utilities.py

Co-authored-by: James Panayis <james.panayis@ukaea.uk>

Author: kzscisoft

simvue/utilities.py

@@ -33,6 +33,7 @@ def find_first_instance_of_file(
 
     Parameters
     ----------
+    file_names: list[str] | str
         candidate names of file to locate
     check_user_space: bool, optional
         check the users home area if current working directory is not