Change tag of the docker image

.gitlab-ci.yml

@@ -20,7 +20,7 @@ stages:
 Build pythonForPandocFilter docker image:
   stage: build
   before_script: cd generateChangemarks
-  script: docker build --tag generatechangemarks:${CI_COMMIT_BRANCH} -f dockerfile .
+  script: docker build --tag "generatechangemarks:${CI_COMMIT_BRANCH}" -f dockerfile .
   rules:
     - if: $CI_COMMIT_BRANCH
       changes: