Clarify that branches needs to be manually pushed to dev
Clarify that branches needs to be manually pushed to dev

- Explicitly call out that testing builds on dev requires
  a manual push to trigger the pipelines in the merge
  request template checklist

Signed-off-by: Balasankar "Balu" C <250a398eb3bfb9862062144cc742cc8f9bdd8d78@gitlab.com>

gitlabhq/omnibus-gitlab,gitlabhq/omnibus-gitlab,gitlabhq/omnibus-gitlab,gitlabhq/omnibus-gitlab