Normalize README metadata and formatting

Normalize model-card metadata and README formatting across Comfy-Org: use a consistent key and tag order, add upstream/base-model metadata where applicable, normalize code fences, remove redundant separators, and ensure a final newline.

README.md

@@ -3,6 +3,8 @@ license: apache-2.0
 tags:
 - comfyui
 - diffusion-single-file
+base_model:
+- netflix/void-model
 ---
 
 # VOID: Video Object and Interaction Deletion
@@ -29,4 +31,4 @@ Place the files in the following folders:
 │   │   └── t5xxl_fp16.safetensors
 │   └── 📂 vae/
 │       └── cogvideox_vae.safetensors
-```
+```