fix: use WAI-NSFW-Illustrious checkpoint instead of non-existent Pony model

Changed checkpoint from 'add-detail-xl.safetensors' (which is a LoRA) to
'waiIllustriousSDXL_v150.safetensors' which is the downloaded anime NSFW model

comfyui/workflows/nsfw/pony-anime-t2i-production-v1.json

@@ -33,8 +33,8 @@
       "properties": {
         "Node name for S&R": "CheckpointLoaderSimple"
       },
-      "widgets_values": ["add-detail-xl.safetensors"],
-      "title": "Pony Diffusion V6 XL Checkpoint"
+      "widgets_values": ["waiIllustriousSDXL_v150.safetensors"],
+      "title": "WAI-NSFW-Illustrious SDXL Checkpoint (Anime/Furry)"
     },
     {
       "id": 2,