Update ssg/build_yaml.py

Co-authored-by: Matthew Burket <[email protected]>

ssg/build_yaml.py

@@ -853,7 +853,7 @@ def _add_groups_xml(self, root, components_to_not_include, env_yaml=None):
                                                   will be appended.
             components_to_not_include (dict): A dictionary specifying components (e.g., groups)
                                               that should not be included.
-            env_yaml (optional): An optional environment YAML configuration that may be passed to
+            env_yaml (dict, optional): An optional environment YAML configuration that may be passed to
                                  the group's to_xml_element method.
         """
         groups_in_bench = list(self.groups.keys())