chore(gh): update mkdocs-git-revision-date-localized-plugin requirement

Updates the requirements on [mkdocs-git-revision-date-localized-plugin](https://github.com/timvink/mkdocs-git-revision-date-localized-plugin) to permit the latest version.
- [Release notes](https://github.com/timvink/mkdocs-git-revision-date-localized-plugin/releases)
- [Commits](timvink/mkdocs-git-revision-date-localized-plugin@v1.2.2...v1.5.1)

---
updated-dependencies:
- dependency-name: mkdocs-git-revision-date-localized-plugin
  dependency-version: 1.5.1
  dependency-type: direct:production
...

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

Author: dependabot[bot]

docs/requirements.txt

@@ -1,4 +1,4 @@
-mkdocs-git-revision-date-localized-plugin >= 1.2.2
+mkdocs-git-revision-date-localized-plugin >= 1.5.1
 mkdocs-markdownextradata-plugin >= 0.2.5
 mkdocs-minify-plugin>=0.7.2
 mkdocs-open-in-new-tab>=1.0.3