Fix Typo in file_system_cache.rs

[petryshkaCODE]

Pull Request Title

Fix Typo in file_system_cache.rs

Description

Corrected a typo in the file_system_cache.rs file to enhance clarity in the code documentation.

Changes Made:

• File Modified: packages/vm/src/modules/file_system_cache.rs
• Summary of Changes:
  • Line 268: Replaced "useable" with "usable" for proper spelling in the comment.

Related Issues

N/A

Checklist

• The change follows the project's contributing guidelines.
• The documentation is now grammatically correct and clearer.
• No functional code changes were made.

Testing

• N/A (Comment update only)

Additional Notes

This is a minor documentation update. Please let me know if there are other areas in the file needing similar corrections.

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Allow edits by maintainers: [x]