mob_db2 inheritance doc

[ahoyaharr]

Pull Request Prelude

• I have followed [proper Hercules code styling][code].
• I have read and understood the [contribution guidelines][cont] before making this PR.
• I am aware that this PR may be closed if the above-mentioned criteria are not fulfilled.

Changes Proposed

Issues addressed:

• Adds Inherit field to documentation in mob_db2
• Fixes a comment about Magnum Break's auto attack modifier

[MishimaHaruna]

Is this bit about overriding drops documented elsewhere with this wording? Because I don't think it's exactly correct, I believe it's currently a bit complicated to properly override drops without breaking anything

If I'm not missing anything in the existing code, it's currently possible to override each drop slot sequentially, but there's no way to cleanly override a slot while leaving the previous ones untouched

[ahoyaharr]

Thanks, fixed now.