Update AZ400_M03_L07_Configure_Pipelines_as_Code_with_YAML.md

Author: kumarself10

Instructions/Labs/AZ400_M03_L07_Configure_Pipelines_as_Code_with_YAML.md

@@ -243,8 +243,8 @@ In this task, you will add continuous delivery to the YAML-based definition of t
       - repository: self
         trigger: none
 
-   stages:
-   - stage: Build
+  stages:
+  - stage: Build
     displayName: Build .Net Core Solution
     jobs:
     - job: Build