Move the `Related to #issue` statement in merge request description to the top
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## What?
When a newly created branch name has a GitLab issue number prepended to it, the GitLab merge request(MR) automatically adds a `Related to #issue_number` statement to the MR description.
## Proposal
Move the `Related to #issue_number` statement in the default MR template to the top of the MR description.
## Why?
* Convenience
* It makes it easier to find the issue directly related to the MR.
issue