title: Is it possible to select a specific branch against which Dependabot should open PR's?
body: <p>Like the title says, on GitHub is it possible to manually select a branch against which Dependabot should open its Pull Requests?</p>
  <p>From what I can see, it opens PR against whichever branch is set to be the main one in the repo settings, but it is possible to select another one?</p>