feat(ci): set `fetch-depth: 0` in trufflehog checkout step

[tengomucho]

This should prevent the issues happening randomly on some commits when bash was having issues escaping some characters.

This is essentially a ripoff from this commit: https://github.com/huggingface/transformers/pull/31663/commits/3af9e835e44c0acc6595da2db8bb9d28cf6115bf