Swapped the order of Hotring Racer 2 (ID: 502, model: hotrina) and Hotring Racer 3 (ID: 503, model: hotrinb)

[SpeedyFolf]

Swapped the order of Hotring Racer 2 (ID: 502, model: hotrina) and Hotring Racer 3 (ID: 503, model: hotrinb) in /mods/deathmatch/logic/CVehicleNames.cpp

Currently when something (such as map editor, race vehiclechange pickup labels, and admin panel) use the function getVehicleNameFromModel, they're reversed from what you'd expect based on their ID, model name, and the vehicles list wiki page. This fixes that.

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• [x] your code follows the coding guidelines
• [x] your commit messages are informative ("update file.cpp" is unhelpful. "fix missing model in getVehicleNameFromModel" is helpful)

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