(Re)Adds open bolt animations for gun sprites (#17219)

Co-authored-by: and_a <and_a@DESKTOP-RJENGIR>
Co-authored-by: metalgearsloth <comedian_vs_clown@hotmail.com>

Resources/Textures/Objects/Weapons/Guns/Pistols/viper.rsi/meta.json

@@ -13,6 +13,9 @@
         {
             "name": "base"
         },
+        {
+            "name": "bolt-open"
+        },
         {
             "name": "mag-0"
         },
@@ -27,9 +30,9 @@
             "name": "inhand-right",
             "directions": 4
         },
-		{
-			"name": "equipped-BELT",
-			"directions": 4
-		}
+        {
+            "name": "equipped-BELT",
+            "directions": 4
+        }
     ]
 }