ultralytics 8.3.20 W&B plots=False logging fix (#17088)

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

ultralytics/__init__.py

@@ -1,6 +1,6 @@
 # Ultralytics YOLO 🚀, AGPL-3.0 license
 
-__version__ = "8.3.19"
+__version__ = "8.3.20"
 
 import os
 

ultralytics/utils/callbacks/wb.py

@@ -137,6 +137,8 @@ def on_train_end(trainer):
     if trainer.best.exists():
         art.add_file(trainer.best)
         wb.run.log_artifact(art, aliases=["best"])
+    # Check if we actually have plots to save
+    if trainer.args.plots:
         for curve_name, curve_values in zip(trainer.validator.metrics.curves, trainer.validator.metrics.curves_results):
             x, y, x_title, y_title = curve_values
             _plot_curve(