Add alt-fire sound to SPAS-12, and adjust animation to fit

src/main/java/com/hbm/handler/guncfg/Gun12GaugeFactory.java

@@ -138,7 +138,7 @@ public class Gun12GaugeFactory {
 		config.firingDuration = 10;
 		config.ammoCap = 8;
 		config.reloadSound = GunConfiguration.RSOUND_SHOTGUN;
-		config.firingSound = "hbm:weapon.shotgunPump";
+		config.firingSound = "hbm:weapon.shotgunPumpAlt";
 		config.reloadType = GunConfiguration.RELOAD_SINGLE;
 		
 		config.config = HbmCollection.g12hs;

src/main/resources/assets/hbm/sounds.json

@@ -199,6 +199,7 @@
     "weapon.extinguisher": {"category": "player", "sounds": [{"name": "weapon/extinguisher", "stream": false}]},
     "weapon.robin_explosion": {"category": "player", "sounds": [{"name": "weapon/robin_explosion", "stream": false}]},
     "weapon.shotgunPump": {"category": "player", "sounds": [{"name": "weapon/shotgunShootPump", "stream": false}]},
+    "weapon.shotgunPumpAlt": {"category": "player", "sounds": [{"name": "weapon/shotgunShootPumpAlt", "stream": false}]},
     "weapon.explosionMedium": {"category": "player", "sounds": [{"name": "weapon/explosion_medium", "stream": false}]},
     "weapon.hicalShot": {"category": "player", "sounds": [{"name": "weapon/hicalShot", "stream": false}]},
     "weapon.coilgunReload": {"category": "player", "sounds": [{"name": "weapon/coilgunReload", "stream": false}]},