Fix load and resume and update autodownload endpoint (#136)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Glenn Jocher <glenn.jocher@ultralytics.com>

ultralytics/yolo/v8/segment/train.py

@@ -17,12 +17,9 @@ from ultralytics.yolo.utils.torch_utils import de_parallel
 class SegmentationTrainer(v8.detect.DetectionTrainer):
 
     def load_model(self, model_cfg=None, weights=None, verbose=True):
-        model = SegmentationModel(model_cfg or getattr(weights, 'yaml', None) or weights['model'].yaml,
-                                  ch=3,
-                                  nc=self.data["nc"],
-                                  verbose=verbose)
+        model = SegmentationModel(model_cfg or weights.yaml, ch=3, nc=self.data["nc"], verbose=verbose)
         if weights:
-            model.load(weights['model'] if isinstance(weights, dict) else weights, verbose)
+            model.load(weights, verbose)
         return model
 
     def get_validator(self):