Update Emscripten binary wheels to include Emscripten platform tags. More work split off from #2591.

### Checklists

- [x] Add a [CHANGELOG](https://github.com/pyodide/pyodide/blob/main/docs/project/changelog.md) entry


import pytest


@pytest.mark.driver_timeout(40)
def test_pyb2d(selenium_standalone, request):
    selenium = selenium_standalone
    selenium.load_package("pyb2d")

    selenium.run(
        """
        import numpy as np
        import b2d
        w = b2d.world(gravity=(0,-10))
        """
    )

import pytest


@pytest.mark.driver_timeout(40)
def test_pyb2d(selenium_standalone, request):
    selenium = selenium_standalone
    selenium.load_package("pyb2d")

    selenium.run(
        """
        import numpy as np
        import b2d
        w = b2d.world(gravity=(0,-10))
        """
    )
