Fix JenkinsFile not pushing web page regen/making build as latest (#7925)

Jenkinsfile

@@ -72,6 +72,11 @@ pipeline {
                     }
                 }
             }
+            post {
+                success {
+                    build job: 'filegenerator', parameters: [string(name: 'COMMAND', value: "promote net.minecraftforge:forge ${env.MYVERSION} latest")], propagate: false, wait: false
+                }
+            }
         }
         stage('test_publish_pr') { //Publish to local repo to test full process, but don't include credentials so it can't sign/publish to maven
             when {