Bump tar and fsevents in /site

Removes [tar](https://github.com/isaacs/node-tar). It's no longer used after updating ancestor dependency [fsevents](https://github.com/fsevents/fsevents). These dependencies need to be updated together.


Removes `tar`

Updates `fsevents` from 1.2.11 to 1.2.13
- [Release notes](https://github.com/fsevents/fsevents/releases)
- [Commits](fsevents/fsevents@v1.2.11...v1.2.13)

---
updated-dependencies:
- dependency-name: tar
  dependency-version: 
  dependency-type: indirect
- dependency-name: fsevents
  dependency-version: 1.2.13
  dependency-type: indirect
...

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Author: dependabot[bot]