Clarify examples and read me

quickstart/101-machine-learning/main.tf

@@ -1,6 +1,16 @@
+terraform {
+  required_version = ">=0.15.0"
+
+  required_providers {
+    azurerm = {
+      source  = "hashicorp/azurerm"
+      version = "=2.56.0"
+    }
+  }
+}
+
 provider "azurerm" {
-    version = "~>2.0"
-    features {}
+  features {}
 }
 
 data "azurerm_client_config" "current" {}

quickstart/101-machine-learning/readme.md

@@ -27,13 +27,7 @@ This template describes the minimal set of resources you require to get started
 ## Usage
 
 ```bash
-terraform plan \
-    -var 'name=azureml999' \
-    -var 'environment=dev' \
-    -var 'location=East US' \
-    -out demo.tfplan
+terraform plan -var name=azureml567 -out demo.tfplan
 
-terraform apply demo.tfplan
+terraform apply "demo.tfplan"
 ```
-
-\* Example shown with [Bash](https://www.gnu.org/software/bash/).  For [Powershell](https://docs.microsoft.com/en-us/powershell/) replace backslashes with backticks.