Updating Pytype None check for eagle_strategy.py

PiperOrigin-RevId: 697616293

vizier/_src/algorithms/optimizers/eagle_strategy.py

@@ -577,7 +577,7 @@ def _loop_body(i, args):
     )
 
   @property
-  def suggestion_batch_size(self) -> int:
+  def suggestion_batch_size(self) -> int | None:
     """The number of suggestions returned at each call of 'suggest'."""
     return self.batch_size