build(deps): bump third-party/doxyconfig from a9f0c38 to 334ad6a (#221)

Bumps [third-party/doxyconfig](https://github.com/LizardByte/doxyconfig) from `a9f0c38` to `334ad6a`.
- [Release notes](https://github.com/LizardByte/doxyconfig/releases)
- [Commits](LizardByte/doxyconfig@a9f0c38...334ad6a)

---
updated-dependencies:
- dependency-name: third-party/doxyconfig
  dependency-version: 334ad6a7421663be9edbaf4897c33b524642ca70
  dependency-type: direct:production
...

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Author: dependabot[bot]