Docs URL fixes and YAML updates (#1383)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Huijae Lee <46982469+ZeroAct@users.noreply.github.com>

ultralytics/yolo/data/scripts/get_coco.sh

@@ -3,7 +3,7 @@
 # Download COCO 2017 dataset http://cocodataset.org
 # Example usage: bash data/scripts/get_coco.sh
 # parent
-# ├── yolov5
+# ├── ultralytics
 # └── datasets
 #     └── coco  ← downloads here
 

ultralytics/yolo/data/scripts/get_coco128.sh

@@ -3,7 +3,7 @@
 # Download COCO128 dataset https://www.kaggle.com/ultralytics/coco128 (first 128 images from COCO train2017)
 # Example usage: bash data/scripts/get_coco128.sh
 # parent
-# ├── yolov5
+# ├── ultralytics
 # └── datasets
 #     └── coco128  ← downloads here
 

ultralytics/yolo/data/scripts/get_imagenet.sh

@@ -3,7 +3,7 @@
 # Download ILSVRC2012 ImageNet dataset https://image-net.org
 # Example usage: bash data/scripts/get_imagenet.sh
 # parent
-# ├── yolov5
+# ├── ultralytics
 # └── datasets
 #     └── imagenet  ← downloads here