update: default preconditioning_compute_steps to 1000

Author: kozistr

pytorch_optimizer/optimizer/shampoo.py

@@ -190,7 +190,7 @@ def __init__(
         decoupled_learning_rate: bool = True,
         inverse_exponent_override: int = 0,
         start_preconditioning_step: int = 25,
-        preconditioning_compute_steps: int = 1,
+        preconditioning_compute_steps: int = 1000,
         statistics_compute_steps: int = 1,
         block_size: int = 256,
         skip_preconditioning_rank_lt: int = 1,