chore(deps): bump doxygen/doxygen-awesome-css

Bumps [doxygen/doxygen-awesome-css](https://github.com/jothepro/doxygen-awesome-css) from `9f97817` to `40e9b25`.
- [Release notes](https://github.com/jothepro/doxygen-awesome-css/releases)
- [Commits](jothepro/doxygen-awesome-css@9f97817...40e9b25)

---
updated-dependencies:
- dependency-name: doxygen/doxygen-awesome-css
  dependency-type: direct:production
...

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Author: dependabot[bot]