Fix regex

Change-Id: I0565672c2c63a3903d5ec027715bd6314e675c24
diff --git a/tcp_tests/templates/shared-backup-restore.yaml b/tcp_tests/templates/shared-backup-restore.yaml
index 043ed92..01240d9 100644
--- a/tcp_tests/templates/shared-backup-restore.yaml
+++ b/tcp_tests/templates/shared-backup-restore.yaml
@@ -134,7 +134,7 @@
 
 - description: WR for https://mirantis.jira.com/browse/PROD-21132
   cmd: |
-    sed -i  's/listen \[\:\:\]\:8080/listen \[\:\:\]\:8181/g'/etc/nginx/sites-available/nginx_proxy_ceph_radosgw.conf ;
+    sed -i  's/listen 8080/listen 8181/g' /etc/nginx/sites-available/nginx_proxy_ceph_radosgw.conf ;
     sed -i  's/listen \[\:\:\]\:80/listen \[\:\:\]\:8181/g' /etc/nginx/sites-available/default ;
     sed -i  's/listen 80 default_server/listen 8181 default_server/g' /etc/nginx/sites-available/default ;
     systemctl restart nginx;