Disabled interpolation in Jenkinsfile for last stage

Jenkinsfile

@@ -181,14 +181,14 @@ EOF
                         sshPut remote: remote, from: "${env.DEB_PATH_RISCV64}", into: "/home/user/repo/debs/"
 
                         echo "Running repository update commands via sshCommand..."
-                        sshCommand remote: remote, command: """
+                        sshCommand remote: remote, command: '''
                             export DEBIAN_FRONTEND=noninteractive
                             cd /home/user/repo/debs/
                             for deb in *.deb; do
                                 reprepro -b /var/www/deb/debian/ includedeb stable $deb
                             done
                             rm -f *.deb
-                        """
+                        '''
 
                         echo "Deb packages successfully uploaded and added to the repository!"
                     }