Get installer from right URL

Change-Id: Ic84102e9d07bc32decb10bb5e433121cb0ebb4ff
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/jenkins/ci-pipelines/ci_stage_3.groovy b/jenkins/ci-pipelines/ci_stage_3.groovy
index f7e77c6..01ed34e 100644
--- a/jenkins/ci-pipelines/ci_stage_3.groovy
+++ b/jenkins/ci-pipelines/ci_stage_3.groovy
@@ -497,7 +497,7 @@
                     ]
 
                     sshCommand remote: remote, command: '''
-                        wget https://osm-download.etsi.org/ftp/osm-11.0-eleven/install_osm.sh
+                        wget https://osm-download.etsi.org/ftp/osm-12.0-twelve/install_osm.sh
                         chmod +x ./install_osm.sh
                         sed -i '1 i\\export PATH=/snap/bin:\$PATH' ~/.bashrc
                     '''