Fix spelling error (posititon to position as README said)

arguments/__init__.py

@@ -72,7 +72,7 @@ class OptimizationParams(ParamGroup):
         self.position_lr_init = 0.00016
         self.position_lr_final = 0.0000016
         self.position_lr_delay_mult = 0.01
-        self.posititon_lr_max_steps = 30_000
+        self.position_lr_max_steps = 30_000
         self.feature_lr = 0.0025
         self.opacity_lr = 0.05
         self.scaling_lr = 0.001

scene/gaussian_model.py

@@ -126,7 +126,7 @@ class GaussianModel:
         self.xyz_scheduler_args = get_expon_lr_func(lr_init=training_args.position_lr_init*self.spatial_lr_scale,
                                                     lr_final=training_args.position_lr_final*self.spatial_lr_scale,
                                                     lr_delay_mult=training_args.position_lr_delay_mult,
-                                                    max_steps=training_args.posititon_lr_max_steps)
+                                                    max_steps=training_args.position_lr_max_steps)
 
     def update_learning_rate(self, iteration):
         ''' Learning rate scheduling per step '''