chore(base_query): Fix typo in comment (#670)

Author: rwhogg

packages/google-cloud-firestore/google/cloud/firestore_v1/base_query.py

@@ -910,7 +910,7 @@ def _comparator(self, doc1, doc2) -> int:
 
         for orderBy in orderBys:
             if orderBy.field.field_path == "id":
-                # If ordering by docuent id, compare resource paths.
+                # If ordering by document id, compare resource paths.
                 comp = Order()._compare_to(doc1.reference._path, doc2.reference._path)
             else:
                 if (