docs: Update README.md

Author: zhoushaw

README.md

@@ -93,7 +93,7 @@ If you use Midscene.js in your research or project, please cite:
 ```bibtex
 @software{Midscene.js,
   author = {Zhou, Xiao and Yu, Tao},
-  title = {Midscene.js: Assign AI as your web operator.},
+  title = {Midscene.js: Let AI be your browser operator.},
   year = {2025},
   publisher = {GitHub},
   url = {https://github.com/web-infra-dev/midscene}