Fix multiply_by_parameter_scale type in adafactor optimizer.

PiperOrigin-RevId: 860187651

Author: emilyfertig

precondition/tearfree/grafting.py

@@ -81,7 +81,7 @@ class Options:
   skip_preconditioning_any_dim_gt: int = 4096
   skip_preconditioning_rank1: bool = True
   min_dim_size_to_factor: int = 128
-  multiply_by_parameter_scale: float = True
+  multiply_by_parameter_scale: bool = True
   clipping_threshold: float = 1.0