Update .gitlab-ci.yml file

.gitlab-ci.yml

@@ -9,7 +9,7 @@
 
 # Official language image. Look for the different tagged releases at:
 # https://hub.docker.com/r/library/rust/tags/
-#image: "rust:latest"
+image: "rust:latest"
 
 # Optional: Pick zero or more services to be used on all builds.
 # Only needed when using a docker container to run your tests in.