Updated DeploymentGuide.md and azure.yml files

Author: NirajC-Microsoft

azure.yaml

@@ -1,6 +1,10 @@
 name: modernize-your-code-solution-accelerator
 metadata:
     template: modernize-your-code-solution-accelerator@1.0
+
+requiredVersions:
+  azd: '>=1.15.0'
+
 parameters:
   AzureAiServiceLocation:
     type: string

docs/DeploymentGuide.md

@@ -107,7 +107,7 @@ If you're not using one of the above options for opening the project, then you'l
 
 1. Make sure the following tools are installed:
 
-    * [Azure Developer CLI (azd)](https://aka.ms/install-azd)
+    * [Azure Developer CLI (azd)](https://aka.ms/install-azd) <small>(v1.15.0+)</small> - version
     * [Python 3.9+](https://www.python.org/downloads/)
     * [Docker Desktop](https://www.docker.com/products/docker-desktop/)
     * [Git](https://git-scm.com/downloads)