Bump simple-get from 3.1.0 to 3.1.1 in /docs

Bumps [simple-get](https://github.com/feross/simple-get) from 3.1.0 to 3.1.1.
- [Release notes](https://github.com/feross/simple-get/releases)
- [Commits](feross/simple-get@v3.1.0...v3.1.1)

---
updated-dependencies:
- dependency-name: simple-get
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]