[Chore] switch to `logger.warning` (#7289)

switch to logger.warning

src/diffusers/schedulers/scheduling_dpmsolver_singlestep.py

@@ -319,13 +319,13 @@ class DPMSolverSinglestepScheduler(SchedulerMixin, ConfigMixin):
         self.sample = None
 
         if not self.config.lower_order_final and num_inference_steps % self.config.solver_order != 0:
-            logger.warn(
+            logger.warning(
                 "Changing scheduler {self.config} to have `lower_order_final` set to True to handle uneven amount of inference steps. Please make sure to always use an even number of `num_inference steps when using `lower_order_final=False`."
             )
             self.register_to_config(lower_order_final=True)
 
         if not self.config.lower_order_final and self.config.final_sigmas_type == "zero":
-            logger.warn(
+            logger.warning(
                 " `last_sigmas_type='zero'` is not supported for `lower_order_final=False`. Changing scheduler {self.config} to have `lower_order_final` set to True."
             )
             self.register_to_config(lower_order_final=True)