Sound Fixes Pack v17.48 - ATS

Added CAT 3408 engine sound and real horn sound for International 9400 in AI traffic for Jazzycat’s Truck Traffic Pack. [American Truck Simulator edition]
Added CAT 3408 engine sound to array for Peterbilt 389’s and Kenworth W900’s in AI traffic. [American Truck Simulator edition]
Added CAT 3408 engine sound to array for Peterbilt 389’s, Kenworth W900’s and International 9400’s in Jazzycat’s American Truck Traffic Pack. [ETS2 edition]
Trimmed loud engine sound file for Ford Mustang in AI traffic. [American Truck Simulator edition]
Replaced 1 forest ambience sound with better sound.