Tune end_s for chunk size 100

Author: ben-z

src/lerobot/policies/smolvla/modeling_smolvla.py

@@ -971,7 +971,7 @@ def rtc_denoise(self, noise, bsize, dt, prefix_pad_masks, past_key_values, devic
         grad_time = 0
 
         # s_end = s
-        s_end = 150
+        s_end = 70
         # Prepare the guidance mask
         W = make_soft_mask(d, s_end, H, device)
         W_row = W[None, :, None]            # broadcast to (B,H,M)