chore(deps): update openapitools/openapi-generator-cli docker tag to v7.21.0#57

tmeckel merged 1 commit intomasterophiosdev/openapi-generator-di:masterfrom

renovate/openapitools-openapi-generator-cli-7.xophiosdev/openapi-generator-di:renovate/openapitools-openapi-generator-cli-7.xCopy head branch name to clipboard