message: ci: replace Keen with Doug in GitHub CODEOWNERS
diff: -/modules/aspnetcore-engine/* @MarkPieszak @kyliau
  +/modules/aspnetcore-engine/* @MarkPieszak @dgp1130
  /modules/builders @alan-agius4
  -/modules/common/* @kyliau @CaerusKaru
  -/modules/express-engine/* @kyliau @FrozenPandaz
  -/modules/hapi-engine/* @kyliau @CaerusKaru
  +/modules/common/* @dgp1130 @CaerusKaru
  +/modules/express-engine/* @dgp1130 @FrozenPandaz
  +/modules/hapi-engine/* @dgp1130 @CaerusKaru
  # Tooling
  -/scripts/** @CaerusKaru @kyliau
  -/integration/** @CaerusKaru @kyliau
  -/tools/** @CaerusKaru @kyliau
  +/scripts/** @CaerusKaru @dgp1130
  +/integration/** @CaerusKaru @dgp1130
  +/tools/** @CaerusKaru @dgp1130
  # Misc
  -/* @kyliau
  -/.github/** @kyliau
  -/modules/* @kyliau
  +/* @dgp1130
  +/.github/** @dgp1130
  +/modules/* @dgp1130
  