Remove AMD reference and update put command to btop in chapter 1.5

Author: geremyCohen

content/learning-paths/servers-and-cloud-computing/multiarch_nginx_on_aks/1.5-create-test-utility.md

@@ -15,8 +15,8 @@ Now that you have your Intel nginx deployment running, you'll create a utility s
 The `nginx_util.sh` script provides three main functions:
 
 - **`get intel|arm|multiarch`** - Test nginx services and show which pod served the request
-- **`put config`** - Apply performance-optimized nginx configuration and install btop monitoring tool
-- **`login intel|amd|arm`** - Interactive bash access to architecture-specific pods
+- **`put btop`** - Install btop monitoring tool on all pods
+- **`login intel|arm`** - Interactive bash access to architecture-specific pods
 
 The script conveniently bundles test and logging commands into a single place, making it easy to test, troubleshoot, and view services. You'll use it throughout the tutorial to test services, apply configurations, and access pods across all architectures.