message: github: tweak wording of PR
diff: @@ -12,7 +12,7 @@ Closes: #
  _If relevant, please state how this was tested. All changes **must** be tested to work:_
  -_If this is a code change, please also indicate which platforms were tested. All platforms directly affected by the change **must** be tested:_
  +_If this is a code change, please also indicate which platforms were tested:_
  - [ ] _Windows_
  - [ ] _macOS_
  