Bump doctrine/static-website-generator from 2.1.0 to 2.1.1

Bumps [doctrine/static-website-generator](https://github.com/doctrine/static-website-generator) from 2.1.0 to 2.1.1.
- [Release notes](https://github.com/doctrine/static-website-generator/releases)
- [Commits](doctrine/static-website-generator@2.1.0...2.1.1)

---
updated-dependencies:
- dependency-name: doctrine/static-website-generator
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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