Update README.md

Corrected grammatical error.

Author: SMDevJi

README.md

@@ -104,7 +104,7 @@ cargo build --release --target wasm32-wasi --features="freeze-stdlib"
 
 ### JIT (Just in time) compiler
 
-RustPython has an **very** experimental JIT compiler that compile python functions into native code. 
+RustPython has a **very** experimental JIT compiler that compile python functions into native code. 
 
 #### Building