Change EmberRoot Zoo Deer to drop Venison

[CactusAcolyte]

Given that Pam's Harvestcraft has a Venison meat, there's ""reason"" to change over the commonly spawning EmberRoot deer to drop it instead of mutton to make venison easier to acquire and give distinction to deer.

Given the opportunity, I also did-over the drop table to be akin to a vanilla animal one.

Previously:

• Deer has a chance to drop 1 mutton (avg. 0.5) OR 1-4 leather (avg. 1.25)

Now:

• Deer drop 1 venison, scaling with looting (avg. 1.0 to 2.5)
• Deer drop 0-2 leather, scaling with looting (avg. 1.0 to 2.5)
• Kills with fire aspect (or any burning) drop cooked venison instead
• Fawns don't drop anything

[CactusAcolyte]

another food related pr.. :pensive: hopefully my code doesn't cause the world to vaporize if I missed that in testing