Fix grammar in readme (#139)

Author: Archmonger

README.md

@@ -7,7 +7,7 @@
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-[ReactPy](https://reactpy.dev/) is a library for building user interfaces in Python without Javascript. ReactPy interfaces are made from components which look and behave similarly to those found in [ReactJS](https://reactjs.org/). Designed with simplicity in mind, ReactPy can be used by those without web development experience while also being powerful enough to grow with your ambitions.
+[ReactPy](https://reactpy.dev/) is a library for building user interfaces in Python without Javascript. ReactPy interfaces are made from components that look and behave similar to those found in [ReactJS](https://reactjs.org/). Designed with simplicity in mind, ReactPy can be used by those without web development experience while also being powerful enough to grow with your ambitions.
 
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