message: [ci] Do not trigger AppVeyor build on .github/ changes
  The `.github/` directory contains GitHub Actions workflows, which do not
  contribute to the AppVeyor builds.
  Do not trigger AppVeyor build on .github/ changes.
diff: # NB: README.md is NOT in this list; the documentation build
  # consumes it.
  - CHANGELOG.md
  - # These files are only used by the Travis CI builds and don't affect
  + # These files are only used by the Linux CI builds and don't affect
  # the Windows builds.
  + - .github/**
  - .travis.yml
  - tools/ci-scripts/linux/**
  