Update deployment workflow for improved clarity and maintainability

Author: Harmanpreet Kaur

.github/workflows/deploy.yml

@@ -12,8 +12,8 @@ on:
       - 'infra/*.parameters.json'
       - 'infra/scripts/**'
       - '.github/workflows/deploy.yml'
-      - 'azure.yml'
-      - 'azure_custom.yml'
+      - 'azure.yaml'
+      - 'azure_custom.yaml'
   pull_request:
     types:
       - opened