chore(deps-dev): bump @openapitools/openapi-generator-cli from 2.21.0 to 2.21.4 in /tools (#636)

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

Author: dependabot[bot]