message: Enable trailingSlash for mvfst
  Summary:
  This change fixes a subtle bug where some links can lead to 404 pages while the destination exists.
  Please see [this comment](https://www.internalfb.com/tasks/?t=102769325&activity=588021855809148) for reasoning behind this change.
diff: @@ -21,6 +21,7 @@ module.exports = {
  favicon: 'img/favicon.ico',
  organizationName: 'facebook', // Usually your GitHub org/user name.
  projectName: 'mvfst', // Usually your repo name.
  + trailingSlash: true,
  presets: [
  [
  