Apply ruff/flake8-pyi rule PYI041

PYI041 Use `float` instead of `int | float`

Author: DimitriPapadopoulos

src/zarr/core/array.py

@@ -294,7 +294,7 @@ async def _create_v2(
         dtype: npt.DTypeLike,
         chunks: ChunkCoords,
         dimension_separator: Literal[".", "/"] | None = None,
-        fill_value: None | int | float = None,
+        fill_value: None | float = None,
         order: Literal["C", "F"] | None = None,
         filters: list[dict[str, JSON]] | None = None,
         compressor: dict[str, JSON] | None = None,