Resolve "Wrong tag naming"

Closes #44 (closed)

ci-templates/README.adoc

@@ -23,7 +23,7 @@ The Core pipeline, defined in link:ci-templates/core.yml[], has the following st
     ** Calls `ddeploy` to generate the docker image
     ** Renames the image created by ddeploy with different tags and pushes them to the registry.
     *** Tag `${COMMIT_SHA}` (hash of commit)
-    *** Tag `${CI_COMMIT_REF_SLUG}` (branch or tag name)
+    *** Tag `${CI_COMMIT_REF}` (branch or tag name)
     *** Tag `latest` only on the default branch
 - Stage: `.post`
   * Check `bash`/`sh` script syntax