Fixed script. [skip ci]

ops/scripts/kubernetes_gitlab_registry_secret.sh

+#!/bin/bash
 kubectl create secret docker-registry gitlab-mpcdf \
-  --docker-server https://gitlab-registry.mpcdf.mpg.de
-  --docker-username $1
-  --docker-password $2
-  --docker-email $3
\ No newline at end of file
+  --docker-server https://gitlab-registry.mpcdf.mpg.de \
+  --docker-username $1 \
+  --docker-password $2 \
+  --docker-email $3