Fix Jenkinsfile

Jenkinsfile

@@ -20,12 +20,12 @@ pipeline {
         
         stage('Compile Translations') {
             steps {
-                sh '''
+                sh '''#!/bin/sh
                 find kapitanbooru_uploader/locales -name "*.po" -exec sh -c '
                     po="$0"
                     mo="${po%.po}.mo"
                     msgfmt "$po" -o "$mo"
-                ' {} \;
+                ' {} \\;
                 '''
             }
         }