Refactor Publish Repository stage in Jenkinsfile to update GPG passphrase handling and improve publishing logic

Jenkinsfile

@@ -59,19 +59,19 @@ pipeline {
                 
                     withCredentials([
                         string(
-                            credentialsId: 'aptly_gpg_pass',
+                            credentialsId: 'espos-gpg-passphrase',
                             variable: 'GPG_PASS'
                         )
                     ]) {
                     
                         sh '''
-                        ssh ${APTLY_HOST} << EOF
+                        ssh ${APTLY_HOST} "GPG_PASS='$GPG_PASS' bash -s" << 'EOF'
         
                         aptly repo add espos-unstable /tmp/*.deb
         
                         if aptly publish list | grep -q espos-unstable
                         then
-                            aptly publish switch \
+                            aptly publish update \
                                 -passphrase="$GPG_PASS" \
                                 espos-unstable
                         else