Update app.py

app.py

@@ -208,7 +208,7 @@ def save_conversation(chat_history, session_id):
     try:
         # Change directory to Private_Book for Git operations
         original_dir = os.getcwd()
-        os.chdir('Private_Book')
+        os.chdir('Chat_Store')
 
         repo.git_add(filename)
         repo.git_commit(f"Add conversation log for session {session_id}")