message: add techdocs-react to tech stack section
diff: @@ -93,13 +93,15 @@ Some of the following items are coming soon and some are potential ideas.
  ## Tech stack
  | Stack | Location |
  -| ----------------------------------------------- | -------------------------------------------------------- |
  +| ----------------------------------------------- | --------------------------------------------------------------- |
  | Frontend Plugin | [`@backstage/plugin-techdocs`][techdocs/frontend] |
  +| Frontend Plugin Library | [`@backstage/plugin-techdocs-react`][techdocs/frontend-library] |
  | Backend Plugin | [`@backstage/plugin-techdocs-backend`][techdocs/backend] |
  | CLI (for local development and generating docs) | [`@techdocs/cli`][techdocs/cli] |
  | Docker Container (for generating docs) | [`techdocs-container`][techdocs/container] |
  [techdocs/frontend]: https://github.com/backstage/backstage/blob/master/plugins/techdocs
  +[techdocs/frontend-library]: https://github.com/backstage/backstage/blob/master/plugins/techdocs-react
  [techdocs/backend]: https://github.com/backstage/backstage/blob/master/plugins/techdocs-backend
  [techdocs/container]: https://github.com/backstage/techdocs-container
  [techdocs/cli]: https://github.com/backstage/techdocs-cli
  