:arrow_up: Bump rugged from 0.28.3.1 to 0.28.4
:arrow_up: Bump rugged from 0.28.3.1 to 0.28.4

Bumps [rugged](https://github.com/libgit2/rugged) from 0.28.3.1 to 0.28.4.
- [Release notes](https://github.com/libgit2/rugged/releases)
- [Changelog](https://github.com/libgit2/rugged/blob/master/CHANGELOG.md)
- [Commits](https://github.com/libgit2/rugged/compare/v0.28.3.1...v0.28.4)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
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