message: Update changelog for recently merged PRs
diff: ### Bug Fixes
  - TypeDoc will now only create one highlighter for rendering code, saving ~200-500ms for rendering time.
  +- For compatibility with JSDoc, TypeDoc will now strip `<caption>` elements from `@example` tags, resolves #1679.
  ### Thanks!
  - @Gudahtt
  +- @mgred
  +- @schlusslicht
  +- @srmagura
  ## v0.22.4 (2021-08-18)
  