chore: add RealVisXL_V4.0 models to download script

This commit adds the https://huggingface.co/SG161222/RealVisXL_V4.0 and
https://huggingface.co/SG161222/RealVisXL_V4.0_Lightning models to the
download script.

runner/dl_checkpoints.sh

@@ -57,15 +57,15 @@ fi
 printf "Downloading %s models...\n" "$MODE"
 if [ "$MODE" = "alpha" ]; then
     printf "\nDownloading unrestricted models...\n"
-    
+
     # Download text-to-image and image-to-image models.
     huggingface-cli download ByteDance/SDXL-Lightning --include "*unet.safetensors" --exclude "*lora.safetensors*" --cache-dir models
-    
+
     # Download image-to-video models (token-gated).
     printf "\nDownloading token-gated models...\n"
     check_hf_auth
     huggingface-cli download stabilityai/stable-video-diffusion-img2vid-xt-1-1 --include "*.fp16.safetensors" "*.json" --cache-dir models "${TOKEN_FLAG}"
-    
+
     printf "\nAlpha models downloaded successfully!\n"
 else
     # Download text-to-image and image-to-image models.
@@ -76,14 +76,16 @@ else
     huggingface-cli download stabilityai/stable-diffusion-xl-base-1.0 --include "*.fp16.safetensors" "*.json" "*.txt" --exclude ".onnx" ".onnx_data" --cache-dir models
     huggingface-cli download prompthero/openjourney-v4 --include "*.safetensors" "*.json" "*.txt" --exclude ".onnx" ".onnx_data" --cache-dir models
     huggingface-cli download ByteDance/SDXL-Lightning --include "*unet.safetensors" --exclude "*lora.safetensors*" --cache-dir models
-
+    huggingface-cli download SG161222/RealVisXL_V4.0_Lightning --include "*.fp16.safetensors" "*.json" "*.txt" --exclude ".onnx" ".onnx_data" --cache-dir models
+    huggingface-cli download SG161222/RealVisXL_V4.0 --include "*.fp16.safetensors" "*.json" "*.txt" --exclude ".onnx" ".onnx_data" --cache-dir models
+
     # Download image-to-video models.
     huggingface-cli download stabilityai/stable-video-diffusion-img2vid-xt --include "*.fp16.safetensors" "*.json" --cache-dir models
-    
+
     # Download image-to-video models (token-gated).
     printf "\nDownloading token-gated models...\n"
     check_hf_auth
     huggingface-cli download stabilityai/stable-video-diffusion-img2vid-xt-1-1 --include "*.fp16.safetensors" "*.json" --cache-dir models "${TOKEN_FLAG}"
-    
+
     printf "\nAll models downloaded successfully!\n"
 fi