chore(deps): update dependency libreddit/libreddit to v0.28.0

This MR contains the following updates:

Package	Update	Change
libreddit/libreddit	minor	v0.27.1 -> v0.28.0

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Release Notes

libreddit/libreddit

v0.28.0

Compare Source

• v0.28.0 f405f50

What's Changed

• Add comment count in post by @​sigaloid in https://github.com/libreddit/libreddit/pull/659
• Register Dockerfile.* as Dockerfiles by @​spenserblack in https://github.com/libreddit/libreddit/pull/694
• Implement instance info endpoint (JSON, YAML, TXT) by @​sigaloid in https://github.com/libreddit/libreddit/pull/685

Full Changelog: https://github.com/libreddit/libreddit/compare/v0.27.1...v0.28.0

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