BUG: fix a typo in __release_buffer__ signature

Co-authored-by: Tim Head <[email protected]>

Author: ev-br

array_api_strict/_array_object.py

@@ -168,7 +168,7 @@ def __buffer__(self, flags):
         if self._device != CPU_DEVICE:
             raise RuntimeError(f"Can not convert array on the '{self._device}' device to a Numpy array.")
         return memoryview(self._array)
-    def __release_buffer(self, buffer):
+    def __release_buffer__(self, buffer):
         # XXX anything to do here?
         pass