Update requirements.txt

requirements.txt

@@ -1,9 +1,9 @@
-fastapi==0.104.1
-uvicorn[standard]==0.24.0
-python-multipart==0.0.6
-openai==0.28.0
-PyPDF2==3.0.1
-google-cloud-vision==3.4.5
-Pillow==10.1.0
-requests==2.31.0
-python-dotenv==1.0.0
+fastapi
+uvicorn[standard]
+python-multipart
+openai
+PyPDF2
+google-cloud-vision
+Pillow
+requests
+pdf2image