fix: remove invalid noise_mode parameter from KSamplerAdvanced

Removed "fixed" parameter that was causing broken pipe error.

KSamplerAdvanced correct parameters (9 values):
- add_noise: "enable"
- seed: 42
- steps: 25
- cfg: 7.5
- sampler_name: "euler"
- scheduler: "normal"
- start_at_step: 0
- end_at_step: 25
- return_with_leftover_noise: "enable"

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

models/comfyui/workflows/advanced/animatediff-video-production-v1.json

@@ -128,7 +128,7 @@
       "order": 7,
       "mode": 0,
       "properties": {"Node name for S&R": "KSamplerAdvanced"},
-      "widgets_values": ["enable", 42, "fixed", 25, 7.5, "euler", "normal", 0, 25, "enable"],
+      "widgets_values": ["enable", 42, 25, 7.5, "euler", "normal", 0, 25, "enable"],
       "title": "AnimateDiff Sampler",
       "inputs": [
         {"name": "model", "type": "MODEL", "link": 7},