Update app.py

deprecated method

app.py

@@ -11,7 +11,7 @@ from newspaper import Article
 import base64 
 import docx2txt
 from io import StringIO
-from PyPDF2 import PdfFileReader
+from PyPDF2 import PdfReader
 import validators
 import nltk
 import warnings
@@ -59,7 +59,7 @@ def extract_text_from_file(file):
 
     # read pdf file
     elif file.type == "application/pdf":
-        pdfReader = PdfFileReader(file)
+        pdfReader = PdfReader(file)
         count = pdfReader.numPages
         all_text = ""
         pdf_title = pdfReader.getDocumentInfo().title