Merge PR #54 update doc on set_variables in recipe

from fix/dss70-project-set-variables-doc

Author: instanceofme

dataikuapi/dss/project.py

@@ -534,7 +534,10 @@ def get_variables(self):
     def set_variables(self, obj):
         """
         Sets the variables of this project.
-        @param obj: must be a modified version of the object returned by get_variables
+        WARNING: if executed from a python recipe, the changes made by `set_variables` will not be "seen" in that recipe.
+                 Use the internal API dataiku.get_custom_variables() instead if this behavior is needed
+
+        @param dict obj: must be a modified version of the object returned by get_variables
         """
         if not "standard" in obj:
             raise ValueError("Missing 'standard' key in argument")