Update value_guided_sampling.py (huggingface#6027)

* Update value_guided_sampling.py

Changed the scheduler step function as predict_epsilon parameter is not there in latest  DDPM Scheduler

* Update value_guided_sampling.md

Updated a link to a working notebook

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Co-authored-by: Sayak Paul <[email protected]>

Author: Parth38

experimental/rl/value_guided_sampling.py

@@ -113,7 +113,7 @@ def run_diffusion(self, x, conditions, n_guide_steps, scale):
             prev_x = self.unet(x.permute(0, 2, 1), timesteps).sample.permute(0, 2, 1)
 
             # TODO: verify deprecation of this kwarg
-            x = self.scheduler.step(prev_x, i, x, predict_epsilon=False)["prev_sample"]
+            x = self.scheduler.step(prev_x, i, x)["prev_sample"]
 
             # apply conditions to the trajectory (set the initial state)
             x = self.reset_x0(x, conditions, self.action_dim)