Update samples.md (#654)

`az pipelines build show --build-id 1 --open` should change to `az pipelines build show --id 1 --open`

doc/samples.md

@@ -100,7 +100,7 @@ You can use --open switch to open any artifact in Azure DevOps portal in your de
 For example :
 
 ```bash
-az pipelines build show --build-id 1 --open
+az pipelines build show --id 1 --open
 ```
 
 This will show the details of build with id 1 on command-line and also open it in the default browser.