Fix broken link

The Previous URL had 404.   Updated it with something that would work.

Author: dj80hd

global-library-examples/global-function/standardBuild.groovy

@@ -1,4 +1,4 @@
-// See https://github.com/jenkinsci/workflow-plugin/tree/master/cps-global-lib#defining-global-functions
+// See https://github.com/jenkinsci/workflow-cps-global-lib-plugin
 
 // The call(body) method in any file in workflowLibs.git/vars is exposed as a
 // method with the same name as the file.
@@ -17,4 +17,4 @@ def call(body) {
         stage 'post'
         sh config.postScript
     }
-}
+}