Added missing steps

Jenkinsfile

@@ -2,16 +2,24 @@ pipeline {
     agent any 
     stages {
         stage('Checkout') {
+            steps{
                 checkout([$class: 'GitSCM', branches: [[name: '*/master']], doGenerateSubmoduleConfigurations: false, extensions: [], submoduleCfg: [], userRemoteConfigs: [[url: 'https://git.wmi.amu.edu.pl/s416138/s416138-mlworkshops']]])
             }
+        }
         stage('Copy results'){
+            steps {
                 copyArtifacts filter: 'wikinews_results.tsv', fingerprintArtifacts: true, projectName: 'ASR-eval', selector: lastSuccessful()
             }
+        }
         stage('Count lines'){
+            steps{
                 sh label: '', script: './count_lines.sh'
             }
+        }
         stage('Archive results'){
+            steps{
                 archiveArtifacts 'counted_lines.txt'
             }
         }
+    }
 }