message: Update changelog for merged PRs
diff: # Unreleased
  +### Features
  +
  +- Added support for GitHub enterprise projects with a `githubprivate.com` domain, #1743.
  +
  ### Bug Fixes
  - Replaced O(n^2) with O(1) implementation for determining unique IDs in a rendered page, #1755.
  +- Fixed crash with when running in very large repositories, #1744.
  - Fixed visible gap after footer in dark mode if `hideGenerator` is set, #1749.
  - Fixed `@category` tag incorrectly appearing on function types if used on a type alias, #1745.
  - Fixed incorrect JS to apply themes on page load, #1709 (again).
  ### Thanks!
  +- @nlfurniss
  - @RunDevelopment
  ## v0.22.6 (2021-09-17)
  