Occasional README update for minimal rust version requirements

Author: youknowone

README.md

@@ -20,7 +20,7 @@ A Python-3 (CPython >= 3.10.0) Interpreter written in Rust :snake: :scream:
 
 #### Check out our [online demo](https://rustpython.github.io/demo/) running on WebAssembly.
 
-RustPython requires Rust latest stable version (e.g 1.43.0 at May 24th 2020). 
+RustPython requires Rust latest stable version (e.g 1.65.0 at November 10th 2022).
 To check Rust version: `rustc --version` If you wish to update,
 `rustup update stable`.