Fix typo

.gitlab-ci.yml

 variables:
   DOCKER_TLS_CERTDIR: ""
   GIT_STRATEGY: clone
-   GIT_SUBMODULE_STRATEGY: recursive
+  GIT_SUBMODULE_STRATEGY: recursive
   REGISTRY_USER: chembl/eubopen
   APPLICATION: eubopen-web
   SERVER_IMAGE_TAG: ${CI_REGISTRY}/${REGISTRY_USER}/${APPLICATION}:${CI_COMMIT_SHORT_SHA}