build(deps): bump contentful in the production-dependencies group (#2039)

Bumps the production-dependencies group with 1 update: [contentful](https://github.com/contentful/contentful.js).


Updates `contentful` from 11.5.18 to 11.5.20
- [Release notes](https://github.com/contentful/contentful.js/releases)
- [Commits](contentful/contentful.js@v11.5.18...v11.5.20)

---
updated-dependencies:
- dependency-name: contentful
  dependency-version: 11.5.20
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: production-dependencies
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]