Build(deps): Bump semver in /docs

Bumps  and [semver](https://github.com/npm/node-semver). These dependencies needed to be updated together.

Updates `semver` from 6.3.0 to 6.3.1
- [Release notes](https://github.com/npm/node-semver/releases)
- [Changelog](https://github.com/npm/node-semver/blob/v6.3.1/CHANGELOG.md)
- [Commits](npm/node-semver@v6.3.0...v6.3.1)

Updates `semver` from 5.7.1 to 5.7.2
- [Release notes](https://github.com/npm/node-semver/releases)
- [Changelog](https://github.com/npm/node-semver/blob/v6.3.1/CHANGELOG.md)
- [Commits](npm/node-semver@v6.3.0...v6.3.1)

Updates `semver` from 7.3.8 to 7.7.3
- [Release notes](https://github.com/npm/node-semver/releases)
- [Changelog](https://github.com/npm/node-semver/blob/v6.3.1/CHANGELOG.md)
- [Commits](npm/node-semver@v6.3.0...v6.3.1)

---
updated-dependencies:
- dependency-name: semver
  dependency-version: 6.3.1
  dependency-type: indirect
- dependency-name: semver
  dependency-version: 5.7.2
  dependency-type: indirect
- dependency-name: semver
  dependency-version: 7.7.3
  dependency-type: indirect
...

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

Author: dependabot[bot]