Fixed broken links towards the documentation website

Author: apichery

dataikuapi/dss/dataset.py

@@ -88,7 +88,7 @@ def get_metadata(self):
         
         Returns:
             a dict object. For more information on available metadata, please see
-            https://doc.dataiku.com/dss/api/latest
+            https://doc.dataiku.com/dss/api/4.3/rest/
         """
         return self.client._perform_json(
                 "GET", "/projects/%s/datasets/%s/metadata" % (self.project_key, self.dataset_name))

dataikuapi/dss/project.py

@@ -81,7 +81,7 @@ def get_metadata(self):
         Get the metadata attached to this project. The metadata contains label, description
         checklists, tags and custom metadata of the project.
 
-        For more information on available metadata, please see https://doc.dataiku.com/dss/api/latest
+        For more information on available metadata, please see https://doc.dataiku.com/dss/api/4.3/rest/
         
         :returns: a dict object containing the project metadata.
         :rtype: dict

dataikuapi/dss/recipe.py

@@ -59,7 +59,7 @@ def get_metadata(self):
 
         Returns:
             a dict object. For more information on available metadata, please see
-            https://doc.dataiku.com/dss/api/latest
+            https://doc.dataiku.com/dss/api/4.3/rest/
         """
         return self.client._perform_json(
                 "GET", "/projects/%s/recipes/%s/metadata" % (self.project_key, self.recipe_name))