fixed a typo

app.py

@@ -4,8 +4,13 @@ import streamlit as st
 
 from lfqa import prepare, answer
 
+
+doc_dir = "data/wiki_gameofthrones_txt12"
+sql_file = 'faiss_doc_store.db'
+faiss_file = 'faiss_index.faiss'
+
 # %% ------------------------------------------- Creating Doc store
-if not os.path.exists(faiss_doc_store.db) or not os.path.exits(faiss_index.faiss):
+if not os.path.exists(sql_file) or not os.path.exits(faiss_file):
     from haystack.document_stores import FAISSDocumentStore
     from haystack.nodes import DensePassageRetriever
     from haystack.utils import convert_files_to_docs, clean_wiki_text
@@ -14,9 +19,7 @@ if not os.path.exists(faiss_doc_store.db) or not os.path.exits(faiss_index.faiss
     module_dir = os.path.dirname(os.path.abspath(__file__))
     os.chdir(module_dir) 
 
-    doc_dir = "data/wiki_gameofthrones_txt12"
-    sql_file = 'faiss_doc_store.db'
-    faiss_file = 'faiss_index.faiss'
+
 
     # %% Download/Load Docs