Add note about compiler version (#709)

Author: 0xLucca

llms.txt

@@ -33207,6 +33207,16 @@ Before getting started, ensure you have done the following:
 
 - Completed the [Install Polkadot SDK Dependencies](/develop/parachains/install-polkadot-sdk/){target=\_blank} guide and successfully installed [Rust](https://www.rust-lang.org/){target=\_blank} and the required packages to set up your development environment
 
+For this tutorial series, you need to use Rust `1.86`. Newer versions of the compiler may not work with this parachain template version.
+
+Run the following commands to set up the correct Rust version:
+
+```bash
+rustup default 1.86
+rustup target add wasm32-unknown-unknown --toolchain 1.86-aarch64-apple-darwin
+rustup component add rust-src --toolchain 1.86-aarch64-apple-darwin
+```
+
 ## Utility Tools
 
 This tutorial requires two essential tools:

tutorials/polkadot-sdk/parachains/zero-to-hero/set-up-a-template.md

@@ -30,6 +30,16 @@ Before getting started, ensure you have done the following:
 
 - Completed the [Install Polkadot SDK Dependencies](/develop/parachains/install-polkadot-sdk/){target=\_blank} guide and successfully installed [Rust](https://www.rust-lang.org/){target=\_blank} and the required packages to set up your development environment
 
+For this tutorial series, you need to use Rust `1.86`. Newer versions of the compiler may not work with this parachain template version.
+
+Run the following commands to set up the correct Rust version:
+
+```bash
+rustup default 1.86
+rustup target add wasm32-unknown-unknown --toolchain 1.86-aarch64-apple-darwin
+rustup component add rust-src --toolchain 1.86-aarch64-apple-darwin
+```
+
 ## Utility Tools
 
 This tutorial requires two essential tools: