Fix mixin registration category

Author: Avanatiker

src/main/resources/lambda.mixins.common.json

@@ -52,6 +52,7 @@
     "render.InGameOverlayRendererMixin",
     "render.LightmapTextureManagerMixin",
     "render.LivingEntityRendererMixin",
+    "render.MobSpawnerBlockEntityRendererMixin",
     "render.ParticleManagerMixin",
     "render.PlayerListHudMixin",
     "render.RenderLayersMixin",
@@ -70,8 +71,5 @@
   ],
   "injectors": {
     "defaultRequire": 1
-  },
-  "mixins": [
-    "render.MobSpawnerBlockEntityRendererMixin"
-  ]
+  }
 }