[YDF] [TF-DF] [PYDF] Fix max_depth parameter documentation

PiperOrigin-RevId: 608336146

Author: rstz

tensorflow_decision_forests/keras/wrappers_pre_generated.py

@@ -243,7 +243,8 @@ class CartModel(core.CoreModel):
       model interpretation as well as hyper parameter tuning. This can take lots
       of space, sometimes accounting for half of the model size. Default: True.
     max_depth: Maximum depth of the tree. `max_depth=1` means that all trees
-      will be roots. Negative values are ignored. Default: 16.
+      will be roots. `max_depth=-1` means that tree depth is not restricted by
+      this parameter. Values <= -2 will be ignored. Default: 16.
     max_num_nodes: Maximum number of nodes in the tree. Set to -1 to disable
       this limit. Only available for `growing_strategy=BEST_FIRST_GLOBAL`.
       Default: None.
@@ -629,7 +630,8 @@ class DistributedGradientBoostedTreesModel(core.CoreModel):
       "max_unique_values_for_discretized_numerical" bins. This parameter will
       impact the model training. Default: False.
     max_depth: Maximum depth of the tree. `max_depth=1` means that all trees
-      will be roots. Negative values are ignored. Default: 6.
+      will be roots. `max_depth=-1` means that tree depth is not restricted by
+      this parameter. Values <= -2 will be ignored. Default: 6.
     max_unique_values_for_discretized_numerical: Maximum number of unique value
       of a numerical feature to allow its pre-discretization. In case of large
       datasets, discretized numerical features with a small number of unique
@@ -1078,7 +1080,8 @@ class GradientBoostedTreesModel(core.CoreModel):
         a.k.a. MAE.
         Default: "DEFAULT".
     max_depth: Maximum depth of the tree. `max_depth=1` means that all trees
-      will be roots. Negative values are ignored. Default: 6.
+      will be roots. `max_depth=-1` means that tree depth is not restricted by
+      this parameter. Values <= -2 will be ignored. Default: 6.
     max_num_nodes: Maximum number of nodes in the tree. Set to -1 to disable
       this limit. Only available for `growing_strategy=BEST_FIRST_GLOBAL`.
       Default: None.
@@ -2136,7 +2139,8 @@ class RandomForestModel(core.CoreModel):
       model interpretation as well as hyper parameter tuning. This can take lots
       of space, sometimes accounting for half of the model size. Default: True.
     max_depth: Maximum depth of the tree. `max_depth=1` means that all trees
-      will be roots. Negative values are ignored. Default: 16.
+      will be roots. `max_depth=-1` means that tree depth is not restricted by
+      this parameter. Values <= -2 will be ignored. Default: 16.
     max_num_nodes: Maximum number of nodes in the tree. Set to -1 to disable
       this limit. Only available for `growing_strategy=BEST_FIRST_GLOBAL`.
       Default: None.