Fix typo

.gitlab-ci.yml

@@ -422,7 +422,7 @@ sync-zotero:
       --build-arg "BASE_URL=$BASE_URL" 
       --build-arg "MEILI_HOST=${MEILI_HOST}" 
       --build-arg "MEILI_API_KEY=$MEILI_API_KEY"
-      --build-arg "SHORT_SHA=${$CI_COMMIT_SHORT_SHA}"
+      --build-arg "SHORT_SHA=${CI_COMMIT_SHORT_SHA}"
       -f $DOCKERFILE $CONTEXT
     - docker push "$CI_REGISTRY_IMAGE/$IMAGE_NAME:$CI_COMMIT_SHORT_SHA"