Fix Ray Tune error (#17416)

Co-authored-by: UltralyticsAssistant <web@ultralytics.com>
Co-authored-by: Glenn Jocher <glenn.jocher@ultralytics.com>

ultralytics/utils/callbacks/raytune.py

@@ -16,8 +16,7 @@ def on_fit_epoch_end(trainer):
     """Sends training metrics to Ray Tune at end of each epoch."""
     if ray.train._internal.session._get_session():  # replacement for deprecated ray.tune.is_session_enabled()
         metrics = trainer.metrics
-        metrics["epoch"] = trainer.epoch
-        session.report(metrics)
+        session.report({**metrics, **{"epoch": trainer.epoch + 1}})
 
 
 callbacks = (