Bump activesupport from 6.0.4.8 to 6.0.6.1 in /docs

Bumps [activesupport](https://github.com/rails/rails) from 6.0.4.8 to 6.0.6.1.
- [Release notes](https://github.com/rails/rails/releases)
- [Changelog](https://github.com/rails/rails/blob/v7.0.4.2/activesupport/CHANGELOG.md)
- [Commits](https://github.com/rails/rails/compare/v6.0.4.8...v6.0.6.1

)

---
updated-dependencies:
- dependency-name: activesupport
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>