[fbsync] fix BoundingBox.wrap_like (#7327)

Reviewed By: vmoens

Differential Revision: D44416543

fbshipit-source-id: a7b43807d30dc57958249b792913a3a44a6e204f

Author: NicolasHug

torchvision/datapoints/_bounding_box.py

@@ -87,7 +87,7 @@ def wrap_like(
 
         """
         if isinstance(format, str):
-            format = BoundingBoxFormat.from_str(format.upper())
+            format = BoundingBoxFormat[format.upper()]
 
         return cls._wrap(
             tensor,