Update docker image path

.gitlab-ci.yml

-image: registry.gitlab.tugraz.at/vpu/webcomponents/toolkit/main:v1
+image: registry.gitlab.tugraz.at/vpu/webcomponents/dbp-toolkit/main:v1
 
 stages:
   - test

.gitlab-ci/build.sh

 #!/bin/bash
 
 set -e
-TAG="registry.gitlab.tugraz.at/vpu/webcomponents/toolkit/main:v1"
+TAG="registry.gitlab.tugraz.at/vpu/webcomponents/dbp-toolkit/main:v1"
 sudo docker build --tag "${TAG}" --file "Dockerfile" .
 echo "Now run: sudo docker push '$TAG'"