Update 'Jenkinsfile'

Jenkinsfile

@@ -1,12 +1,13 @@
 pipeline {
     agent {
-        docker { image 'python:3' }
+        docker { image 'python:3.10' }
     }
     stages {
         stage('Test') {
             steps {
                 sh 'pip --version'
-                sh 'sudo pip install -r requirements.txt'
+                sh 'pip install black'
+                sh 'black ./'
             }
         }
     }