Update abcd/backends/atoms_opensearch.py

Co-authored-by: Jacob Wilkins <[email protected]>

Author: ElliottKasoar

abcd/backends/atoms_opensearch.py

@@ -386,7 +386,7 @@ def push(
         Parameters
         ----------
         atoms: Union[Atoms, Iterable]
-        extra_info: Optional[dict, str], optional
+        extra_info: Optional[Union[dict, str]], optional
             Extra information to store in the document with the atoms data.
             Default is `None`.
         store_calc: bool, optional