change PROD_ONLY branch, to current working branch

.gitlab-ci.yml

 variables:
   DEST: /var/www/html/marcus-admin/components
-  PROD_ONLY_BRANCH: master
+  PROD_ONLY_BRANCH: 8-noe-css-har-forsvunnet-i-oppgraderinger-endringer
 stages:   
 - build
 - deploy