message: updated merge (do not rebase) guidelines.
diff: @@ -236,8 +236,10 @@ to determine if the requested feature aligns with the TFLM roadmap.
  ## During the PR review
  -1. Do not change the git version history. Always merge upstream/master, ***do not
  - rebase*** and no force-pushes please.
  +1. Do not change the git version history.
  + * Always merge upstream/master (***do not rebase***) and no force-pushes please.
  + * Having an extra merge commit it ok as the github review tool handles that
  + gracefully.
  Assuming that you forked tensorflow and added a remote called upstream with:
  