ci: fix publish steps by adding builder folder

Signed-off-by: Jakub Sokołowski <jakub@status.im>

Jenkinsfile

@@ -55,15 +55,18 @@ pipeline {
     stage('Publish Prod') {
       when { expression { env.GIT_BRANCH ==~ /.*master/ } }
       steps {
+        dir('builder') {
           sshagent(credentials: ['status-im-auto-ssh']) {
             sh "ghp-import -p public"
           }
         }
       }
+    }
 
     stage('Publish Devel') {
       when { expression { env.GIT_BRANCH ==~ /.*develop/ } }
       steps {
+        dir('builder') {
           sshagent(credentials: ['jenkins-ssh']) {
             sh """
               rsync -e 'ssh -o ${SCP_OPTS}' -r --delete public/. \
@@ -73,6 +76,7 @@ pipeline {
         }
       }
     }
+  }
 
   post {
     cleanup { cleanWs() }