build: bump yell from 2.2.0 to 2.2.1 in /docs
build: bump yell from 2.2.0 to 2.2.1 in /docs

Bumps [yell](https://github.com/rudionrails/yell) from 2.2.0 to 2.2.1.
- [Release notes](https://github.com/rudionrails/yell/releases)
- [Commits](https://github.com/rudionrails/yell/commits)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
MikeMcQuaid/brew,claui/brew,reitermarkus/brew,mahori/brew,Homebrew/brew,mahori/brew,claui/brew,konqui/brew,vitorgalvao/brew,MikeMcQuaid/brew,reitermarkus/brew,claui/brew,nandub/brew,EricFromCanada/brew,JCount/brew,konqui/brew,vitorgalvao/brew,JCount/brew,vitorgalvao/brew,MikeMcQuaid/brew,JCount/brew,nandub/brew,EricFromCanada/brew,nandub/brew,Homebrew/brew,Homebrew/brew,nandub/brew,mahori/brew,vitorgalvao/brew,sjackman/homebrew,konqui/brew,sjackman/homebrew,konqui/brew,sjackman/homebrew,EricFromCanada/brew,reitermarkus/brew,Homebrew/brew,reitermarkus/brew,MikeMcQuaid/brew,JCount/brew,claui/brew,mahori/brew,EricFromCanada/brew,sjackman/homebrew