fix: update PdfReader import from PyPDF2 to pypdf in pdf_utils.py

requirements.txt

@@ -3,7 +3,7 @@ openai
 motor
 pymongo
 tiktoken
-PyPDF2
+pypdf
 beautifulsoup4
 requests
 aiohttp

src/utils/pdf_utils.py

@@ -3,7 +3,7 @@ import asyncio
 import discord
 import logging
 from typing import List, Dict, Any, Optional, Tuple
-from PyPDF2 import PdfReader
+from pypdf import PdfReader
 from src.config.config import PDF_BATCH_SIZE
 from src.utils.openai_utils import trim_content_to_token_limit