Bump axios and @openapitools/openapi-generator-cli in /dev-tools (#295)

Bumps [axios](https://github.com/axios/axios) to 1.6.8 and updates ancestor dependency [@openapitools/openapi-generator-cli](https://github.com/OpenAPITools/openapi-generator-cli). These dependencies need to be updated together.


Updates `axios` from 0.21.1 to 1.6.8
- [Release notes](https://github.com/axios/axios/releases)
- [Changelog](https://github.com/axios/axios/blob/v1.x/CHANGELOG.md)
- [Commits](axios/axios@v0.21.1...v1.6.8)

Updates `@openapitools/openapi-generator-cli` from 2.2.5 to 2.13.4
- [Release notes](https://github.com/OpenAPITools/openapi-generator-cli/releases)
- [Changelog](https://github.com/OpenAPITools/openapi-generator-cli/blob/master/.releaserc)
- [Commits](OpenAPITools/openapi-generator-cli@v2.2.5...v2.13.4)

---
updated-dependencies:
- dependency-name: axios
  dependency-type: indirect
- dependency-name: "@openapitools/openapi-generator-cli"
  dependency-type: direct:development
...

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Author: dependabot[bot]