[BUG] Fix error in soft dependencies for HF hub in monster loader

[Cyril-Meyer]

Reference Issues/PRs

Fixes #3406

What does this implement/fix? Explain your changes.

Replace "-" with "_"

Does your contribution introduce a new dependency? If yes, which one?

No, but I have discovered another error in dependency check

Any other comments?

Do not close issue, still things going on

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[baraline]

Confusion between pypi package name and actual python import in the original code cause the issue. LGTM