Update Legal docstring

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: MartiONE

epo_ops/api.py

@@ -130,7 +130,7 @@ def legal(
 
         Args:
             reference_type (str): Any of "publication", "application", or "priority".
-            input (Epodoc or Docdb): The document number as a Epodoc or Docdb data object.
+            input (Original, Epodoc, or Docdb): The document number as an Original, Epodoc, or Docdb data object.
         Returns:
             requests.Response: a requests.Response object.