update rust version requirements (GTM-2281)

credible/credible-install.mdx

@@ -22,21 +22,25 @@ This will install the `pcl` binary.
 
 Another convenient way to install `pcl` is using Cargo. It does require a couple of pre-requisites though:
 
-- **Rust Nightly** (version 1.80 or later)
+- **Rust Stable** (version 1.81 or later) or **Rust Nightly** (version 1.80 or later)
 - **Git**
 
 ```bash
 cargo +nightly install --git https://github.com/phylaxsystems/credible-sdk --locked pcl
 ```
 
+<Note>
+If above fails, try updating Rust with `rustup update` and try again.
+</Note>
+
 This will install the `pcl` binary in your Cargo installation directory (typically `~/.cargo/bin` on Unix-like systems). Make sure this directory is in your PATH.
 
 ### Option 3: Build from Source
 
 This option is recommended if you want more control over the build process or prefer to build from source.
 
 Prerequisites:
-- **Rust Nightly** (version 1.80 or later)
+- **Rust Stable** (version 1.81 or later) or **Rust Nightly** (version 1.80 or later)
 - **Git**
 
 1. Clone the repository:
@@ -50,6 +54,10 @@ Prerequisites:
    cargo build --release --bin pcl
    ```
 
+<Note>
+If above fails, try updating Rust with `rustup update` and try again.
+</Note>
+
 3. The compiled binary will be available in the `target/release` directory.
 
 4. (Optional) Add the binary to your PATH for easier access: