message: Fix `border-radius` of `forked-to` feature
diff: }
  .rgh-forked-to.rgh-hide-watch-and-fork-count .rgh-forked-button {
  - border-bottom-right-radius: 0.25em; /* Matches GitHub's default */
  - border-top-right-radius: 0.25em; /* Matches GitHub's default */
  + border-bottom-right-radius: 6px; /* Matches GitHub's default */
  + border-top-right-radius: 6px; /* Matches GitHub's default */
  }
  