:feature: update default overlap value in occlusion sensitivity to 0.6

Author: kavin2003

monai/visualize/occlusion_sensitivity.py

@@ -80,7 +80,7 @@ def __init__(
         n_batch: int = 16,
         verbose: bool = True,
         mode: str | float | Callable = "gaussian",
-        overlap: float = 0.25,
+        overlap: float = 0.6,
         activate: bool | Callable = True,
     ) -> None:
         """