Fix typo in crawler.py (#842)

seperator -> separator

Author: Ikko Eltociear Ashimine

langchain/chains/natbot/crawler.py

@@ -336,7 +336,7 @@ def add_to_hash_tree(
                 element_node_value = strings[node_value[index]]
                 if (
                     element_node_value == "|"
-                ):  # commonly used as a seperator, does not add much context - lets save ourselves some token space
+                ):  # commonly used as a separator, does not add much context - lets save ourselves some token space
                     continue
             elif (
                 node_name == "input"