Update README.md

Author: longbinlai

python/graphy/README.md

@@ -5,7 +5,7 @@ If you found Graphy helpful, please star [GraphScope](https://github.com/alibaba
 
 A [demonstration video of Graphy](https://www.youtube.com/watch?v=uM4nzkAdGlM) is available to walk you through the literature-survey process.
 
-**News**: Graphy is accepted as a demo paper at [Sigmod 2025](https://2025.sigmod.org/). See you in Berlin, Germany. 
+**News**: Graphy has been accepted as a demo paper at [Sigmod 2025](https://2025.sigmod.org/). See you in Berlin, Germany. 
 
 ## What is Graphy capable of? 🤔