fix: fix link due to package name change

[LesnyRumcajs]

Summary of changes

Changes introduced in this pull request:

• fixes:

### Errors in docs/docs/users/knowledge_base/snapshot_service.md

* [404] [https://docs.rs/forest-filecoin/latest/forest_filecoin/db/car/forest/index.html](https://docs.rs/forest-filecoin/latest/forest_filecoin/db/car/forest/index.html) | Network error: Not Found

Reference issue to close (if applicable)

Closes

Other information and links

Change checklist

• I have performed a self-review of my own code,
• I have made corresponding changes to the documentation. All new code adheres to the team's documentation standards,
• I have added tests that prove my fix is effective or that my feature works (if possible),
• I have made sure the CHANGELOG is up-to-date. All user-facing changes should be reflected in this document.