Adjust tuple construction in ImageGrab to fix mypy on macOS

[akx]

Split out per #9803 (comment)

[hugovk]

Thanks, on macOS, on main I get:

❯ tox -e mypy
mypy: commands[0]> mypy conftest.py selftest.py setup.py checks docs src winbuild Tests
src/PIL/ImageGrab.py:82: error: Argument "box" to "resize" of "Image" has incompatible
type "tuple[int, ...]"; expected "tuple[float, float, float, float] | None"  [arg-type]
                                box=tuple(coord * 2 for coord in bbox),
                                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Found 1 error in 1 file (checked 302 source files)
mypy: exit 1 (2.58 seconds) /Users/hugo/github/Pillow> mypy conftest.py selftest.py setup.py checks docs src winbuild Tests pid=84969
  mypy: FAIL code 1 (2.58=setup[0.00]+cmd[2.58] seconds)
  evaluation failed :( (2.63 seconds)

And with this PR:

❯ tox -e mypy
mypy: commands[0]> mypy conftest.py selftest.py setup.py checks docs src winbuild Tests
Success: no issues found in 302 source files
  mypy: OK (2.22=setup[0.00]+cmd[2.22] seconds)
  congratulations :) (2.27 seconds)