fix: use VIT-G preset instead of PLUS for SDXL compatibility

- Change IPAdapterUnifiedLoader preset from 'PLUS (high strength)' to 'VIT-G (medium strength)'
- PLUS preset expects ViT-H (1024 dim) but loads ViT-bigG (1280 dim) causing shape mismatch
- VIT-G preset works correctly with SDXL models
- Fixes: size mismatch error in Resampler proj_in.weight

comfyui/workflows/image-to-image/ipadapter-style-i2i-production-v1.json

@@ -140,7 +140,7 @@
         "Node name for S&R": "IPAdapterUnifiedLoader"
       },
       "widgets_values": [
-        "PLUS (high strength)"
+        "VIT-G (medium strength)"
       ],
       "title": "IP-Adapter Loader"
     },