Minor doc update (#128)

Signed-off-by: Simon Davies <[email protected]>
Co-authored-by: Mark Rossetti <[email protected]>

README.md

@@ -182,7 +182,7 @@ After having an environment with a hypervisor setup, running the example has the
 
 1. On Linux or WSL, you'll most likely need build essential. For Ubuntu, run `sudo apt install build-essential`. For
    Azure Linux, run `sudo dnf install build-essential`.
-2. [Rust](https://www.rust-lang.org/tools/install). Install toolchain v1.78.0 or later.
+2. [Rust](https://www.rust-lang.org/tools/install). Install toolchain v1.81 or later.
 
    Also, install the `x86_64-pc-windows-msvc` and `x86_64-unknown-none` targets, these are needed to build the test
    guest binaries. (Note: install both targets on either Linux or Windows: Hyperlight can load ELF or PE files on either
@@ -193,7 +193,7 @@ After having an environment with a hypervisor setup, running the example has the
     rustup target add x86_64-pc-windows-msvc
     ```
 
-3. [just](https://github.com/casey/just). `cargo install just` .
+3. [just](https://github.com/casey/just). `cargo install just` On Windows you also need [pwsh](https://learn.microsoft.com/en-us/powershell/scripting/install/installing-powershell-on-windows?view=powershell-7.4).
 4. [clang and LLVM](https://clang.llvm.org/get_started.html).
     - On Ubuntu, run: