Fix the docstring of xywhr2xyxyxyxy (#14934)

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

ultralytics/utils/ops.py

@@ -528,7 +528,7 @@ def ltwh2xywh(x):
 def xyxyxyxy2xywhr(x):
     """
     Convert batched Oriented Bounding Boxes (OBB) from [xy1, xy2, xy3, xy4] to [xywh, rotation]. Rotation values are
-    expected in degrees from 0 to 90.
+    returned in radians from 0 to pi/2.
 
     Args:
         x (numpy.ndarray | torch.Tensor): Input box corners [xy1, xy2, xy3, xy4] of shape (n, 8).
@@ -551,7 +551,7 @@ def xyxyxyxy2xywhr(x):
 def xywhr2xyxyxyxy(x):
     """
     Convert batched Oriented Bounding Boxes (OBB) from [xywh, rotation] to [xy1, xy2, xy3, xy4]. Rotation values should
-    be in degrees from 0 to 90.
+    be in radians from 0 to pi/2.
 
     Args:
         x (numpy.ndarray | torch.Tensor): Boxes in [cx, cy, w, h, rotation] format of shape (n, 5) or (b, n, 5).