change entrypoint for pandoc/ubuntu in yaml

.gitlab-ci.yml

@@ -18,7 +18,7 @@ pandoc:
   stage: test
   dependencies: [preprocessing]
   image:
-    name: pandoc/ubuntu-latex:latest
+    name: pandoc/ubuntu:latest
     entrypoint: ["/bin/bash", "-c"]
   script:
     - ./buildPandoc.sh