Update README.md

Reduced size of QR code

README.md

@@ -55,7 +55,9 @@ If you do not wish to set up your system at all, and you do not mind using the a
 the app on the website https://share.streamlit.io/asdfghjkxd/articpy/main/app.py! You can quickly access the website 
 by scanning the QR Code below too!
 
-![WebApp_QRcode](.assets/qr-code.png)
+<div align="center">
+    <img src=".assets/qr-code.png" alt="Poster" width="200" height="200">
+</div>
 
 Do note that the performance of the app is restricted to the resources available for the container used to host 
 the app online. If you wish to use a GPU, or if your workflow requires greater computing power, kindly use the