Fix box parameter type of Pillow.PIL.Image.paste (#8090)

When executing `img.paste(cropped, box=(10.5, 10.5))`:
TypeError: 'float' object cannot be interpreted as an integer

So the `box` parameter's type should be not `tuple[float, float]` but `tuple[int, int]`. (same as `_Box`)

Author: eggplants

stubs/Pillow/PIL/Image.pyi

@@ -163,7 +163,7 @@ class Image:
     def getprojection(self) -> tuple[list[int], list[int]]: ...
     def histogram(self, mask: Image | None = ..., extrema: tuple[int, int] | tuple[float, float] | None = ...) -> list[int]: ...
     def entropy(self, mask: Image | None = ..., extrema: tuple[int, int] | tuple[float, float] | None = ...) -> float: ...
-    def paste(self, im: Image | _Color, box: tuple[float, float] | _Box | None = ..., mask: Image | None = ...) -> None: ...
+    def paste(self, im: Image | _Color, box: tuple[int, int] | _Box | None = ..., mask: Image | None = ...) -> None: ...
     def alpha_composite(self, im: Image, dest: tuple[int, int] = ..., source: tuple[int, int] = ...) -> None: ...
     def point(self, lut, mode: _Mode | None = ...) -> Image: ...
     def putalpha(self, alpha: Image | int) -> None: ...