build(deps): bump doxygen-awesome-css from c064ec1 to 3831e5c

Bumps [doxygen-awesome-css](https://github.com/jothepro/doxygen-awesome-css) from `c064ec1` to `3831e5c`.
- [Release notes](https://github.com/jothepro/doxygen-awesome-css/releases)
- [Commits](jothepro/doxygen-awesome-css@c064ec1...3831e5c)

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

Signed-off-by: dependabot[bot] <[email protected]>