Change: Increase ToxinTruckGunGamma damage from 17.5 to 18.75

[xezon]

Continuation of

• Change: Redistribute Toxin Tractor Gamma damage bonus to stay within 50% max #889

Slightly increases ToxinTruckGunGamma damage.

Weapon	Bonus over Anthrax Beta	Bonus over Toxin	Change over Toxin
Original Chem_ToxinTruckGunGamma	+64%	+105%
Original Chem_ToxinTruckGunGammaPlusOne	+63%	+145%
Original Chem_ToxinTruckGunGammaPlusTwo	+42%	+185%
Original Chem_ToxinTruckSprayerGamma	+0%	+25%
Original Chem_ToxinTruckSprayerGammaPlusOne	+33%	+75%
Original Chem_ToxinTruckSprayerGammaPlusTwo	+28%	+125%
Patched Chem_ToxinTruckGunGamma (1)	+40%	+75%	-30%
Patched Chem_ToxinTruckGunGamma (this)	+50%	+88%	-20%
Patched Chem_ToxinTruckGunGammaPlusOne (1)	+50%	+125%	-20%
Patched Chem_ToxinTruckGunGammaPlusTwo (1)	+50%	+200%	+15%
Patched Chem_ToxinTruckSprayerGamma (1)	+20%	+50%	+25%