message: docs(web-components): update ToC of implementation notes
  ### Related Ticket(s)
  Refs
  ### Changelog
  **Changed**
  Updates the ToC of `IMPLEMENTATION_NOTES.md`.
diff: - [Build procedure to generate React wrapper](#build-procedure-to-generate-react-wrapper)
  - [Limited components to generate React wrapper](#limited-components-to-generate-react-wrapper)
  - [Non-React APIs for React integration](#non-react-apis-for-react-integration)
  + - [React SSR integration](#react-ssr-integration)
  + - [Composite/container components for React](#compositecontainer-components-for-react)
  - [Container components](#container-components)
  - [Triggering action dispatcher](#triggering-action-dispatcher)
  - [Masthead search](#masthead-search)
  