Bump pygccxml from 2.4.0 to 2.5.0 in /.github (#198)

Bumps [pygccxml](https://github.com/CastXML/pygccxml) from 2.4.0 to 2.5.0.
- [Release notes](https://github.com/CastXML/pygccxml/releases)
- [Changelog](https://github.com/CastXML/pygccxml/blob/develop/CHANGELOG.md)
- [Commits](CastXML/pygccxml@v2.4.0...v2.5.0)

---
updated-dependencies:
- dependency-name: pygccxml
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/requirements.txt

@@ -3,7 +3,7 @@ Markdown==3.6
 markdown-include==0.8.1
 mdx_truly_sane_lists==1.3
 mkdocs==1.5.3
-pygccxml==2.4.0
+pygccxml==2.5.0
 Pygments==2.17.2
 pymdown-extensions==10.7.1
 pyplusplus==1.8.5