suggested a pipeline Syntax snippet generator in the plugin doc

Author: ciradu2204

README.md

@@ -7,7 +7,7 @@
 ## Introduction
 
 This plugin allows pipelines to use standard Jenkins SCM plugins to check out source code.
-The goals are the maximum possible compatibility with existing plugins, and great flexibility for script authors.
+The goals are the maximum possible compatibility with existing plugins, and great flexibility for script authors. The ["Pipeline Syntax" snippet generator](https://www.jenkins.io/redirect/pipeline-snippet-generator) guides the user to define the checkout step.
 
 ## Features