Update Return type of _get_related_resources to Action (#2803)

Author: Sam-Martin

boto3/resources/model.py

@@ -549,7 +549,7 @@ def _get_related_resources(self, subresources):
         :type subresources: bool
         :param subresources: ``True`` to get sub-resources, ``False`` to
                              get references.
-        :rtype: list(:py:class:`ResponseResource`)
+        :rtype: list(:py:class:`Action`)
         """
         resources = []
 
@@ -578,7 +578,7 @@ def subresources(self):
         """
         Get a list of sub-resources.
 
-        :type: list(:py:class:`ResponseResource`)
+        :type: list(:py:class:`Action`)
         """
         return self._get_related_resources(True)
 
@@ -587,7 +587,7 @@ def references(self):
         """
         Get a list of reference resources.
 
-        :type: list(:py:class:`ResponseResource`)
+        :type: list(:py:class:`Action`)
         """
         return self._get_related_resources(False)