message: Update name of branch containing release history.
diff: @@ -569,7 +569,7 @@ The Suite developers follow the [GitFlow](http://nvie.com/posts/a-successful-git
  branch. Then, create a pull request with the `develop` branch as the
  destination when it is ready to be reviewed. The `develop` branch contains the
  latest work in RAJA Performance Suite. Periodically, we will merge the
  -develop branch into the `master` branch and tag a new release.
  +develop branch into the `main` branch and tag a new release.
  If you would like to contribute to the RAJA Performance Suitea, or have
  questions about doing so, please contact one of its developers. See below.
  