URL broken "Page Not Found" (PUBLISH_FOR_PULL_REQUEST)

The URL: https://circleci.com/docs/1.0/fork-pr-builds/ no longer exists in the infox text for `PUBLISH_FOR_PULL_REQUEST`:

https://github.com/electron-userland/electron-builder/blob/f2c0547d2fa63d42636713415d4100aceb443e00/packages/app-builder-lib/src/publish/PublishManager.ts#L48

Start at packages/app-builder-lib/src/publish/PublishManager.ts around line 48 and inspect the info text for PUBLISH_FOR_PULL_REQUEST. Confirm the CircleCI URL is dead, replace it with the correct destination, and verify that the resulting link resolves and the surrounding publish text remains accurate.

Written by the indexing model from the issue text.