add note about rust 1.53 or newer to README.md

This is due to the use of "or patterns" inside a match. This was
stabilized in rust 1.53: rust-lang/rust#79278

(and, I believe, is being used in the Linux daemon)

README.md

@@ -1,7 +1,7 @@
 # Thelio Io Windows Driver (WORK IN PROGRESS)
 
 - Install GIT LFS prior to cloning this repository
-- Install Rust from https://rustup.rs/
+- Install Rust from https://rustup.rs/ 1.53.0 or newer (ie `rustup toolchain install 1.55.0`)
 - Install Chocolaty from https://chocolatey.org/install
 - Launch an Administrator Command Prompt and run the following:
 ```