fix Project-MONAI#8137

Signed-off-by: YunLiu <[email protected]>

monai/transforms/regularization/array.py

@@ -111,6 +111,11 @@ class CutMix(Mixer):
         documentation for details on the constructor parameters. Here, alpha not only determines
         the mixing weight but also the size of the random rectangles used during for mixing.
         Please refer to the paper for details.
+        
+        Please note that there is a change in behavior starting from version 1.4.0. In the previous
+        implementation, the transform would generate a different label each time it was called.
+        To ensure determinism, the new implementation will now generate the same label for
+        the same input image when using the same operation.
 
         The most common use case is something close to: