build(deps): bump mkdocs-glightbox from 0.3.0 to 0.3.1

Bumps [mkdocs-glightbox](https://github.com/Blueswen/mkdocs-glightbox) from 0.3.0 to 0.3.1.
- [Release notes](https://github.com/Blueswen/mkdocs-glightbox/releases)
- [Changelog](https://github.com/blueswen/mkdocs-glightbox/blob/main/CHANGELOG)
- [Commits](https://github.com/Blueswen/mkdocs-glightbox/compare/v0.3.0...v0.3.1)

---
updated-dependencies:
- dependency-name: mkdocs-glightbox
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

docs/requirements.txt

@@ -1,4 +1,4 @@
-mkdocs-glightbox==0.3.0
+mkdocs-glightbox==0.3.1
 mkdocs-awesome-pages-plugin==2.8.0
 mkdocs-git-revision-date-localized-plugin==1.1.0
 mkdocs-macros-plugin==0.7.0