Document TableAlreadyExistsError in catalog.rename_table

Author: ebyhr

pyiceberg/catalog/__init__.py

@@ -544,6 +544,7 @@ def rename_table(self, from_identifier: str | Identifier, to_identifier: str | I
 
         Raises:
             NoSuchTableError: If a table with the name does not exist.
+            TableAlreadyExistsError: If the target table already exists.
         """
 
     @abstractmethod