Increase step duration in SMC grad inference calculation from 5.0 to 6.0

src/smc/inference.py

@@ -165,7 +165,7 @@ def infer_smc_grad(config: SMCGradInferenceConfig, device='cpu'):
 
 def _get_smc_grad_duration(config: SMCGradInferenceConfig, pipe: Pipeline, device='cpu') -> int:
     setup_duration = 30.0
-    step_duration = 5.0
+    step_duration = 6.0
     total_duration = math.ceil(setup_duration + step_duration * config.steps)
     return max(total_duration, MIN_GPU_DURATION)