docs: clarify offline CLI installation instructions (coder#19914)

Author: matifali

docs/images/install/install_from_deployment.png

@@ -58,15 +58,13 @@ coder login https://coder.example.com
 ## Download the CLI from your deployment
 
 > [!NOTE]
-> Available in Coder 2.19 and newer.
+> Available in Coder 2.19 and newer on macOS and Linux clients only.
 
 Every Coder server hosts CLI binaries for all supported platforms. You can run a
 script to download the appropriate CLI for your machine from your Coder
 deployment.
 
-```sh
-curl -L https://coder.example.com/install.sh | sh
-```
+![Install Coder binary from your deplyment](../images/install/install_from_deployment.png)
 
 This script works within air-gapped deployments and ensures that the version of
 the CLI you have installed on your machine matches the version of the server.