chore: update rust version badge

README.md

@@ -3,7 +3,7 @@
 [![LICENSE](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/0xPolygonMiden/crypto/blob/main/LICENSE)
 [![test](https://github.com/0xPolygonMiden/crypto/actions/workflows/test.yml/badge.svg)](https://github.com/0xPolygonMiden/crypto/actions/workflows/test.yml)
 [![no-std](https://github.com/0xPolygonMiden/crypto/actions/workflows/no-std.yml/badge.svg)](https://github.com/0xPolygonMiden/crypto/actions/workflows/no-std.yml)
-[![RUST_VERSION](https://img.shields.io/badge/rustc-1.75+-lightgray.svg)]()
+[![RUST_VERSION](https://img.shields.io/badge/rustc-1.80+-lightgray.svg)]()
 [![CRATE](https://img.shields.io/crates/v/miden-crypto)](https://crates.io/crates/miden-crypto)
 
 This crate contains cryptographic primitives used in Polygon Miden.