Update src/array_api_typing/_array.py

Co-authored-by: Joren Hammudoglu <jhammudoglu@gmail.com>
Signed-off-by: Nathaniel Starkman <nstarman@users.noreply.github.com>

Author: nstarman

src/array_api_typing/_array.py

@@ -43,7 +43,7 @@ class HasDType(Protocol[DTypeT_co]):
     """Protocol for array classes that have a data type attribute."""
 
     @property
-    def dtype(self) -> DTypeT_co:
+    def dtype(self, /) -> DTypeT_co:
         """Data type of the array elements."""
         ...