Update stubs for MicroPython updates.

[microbit-matt-hillsdon]

Only the English stubs have a meaningful upgrade here. We'll need a translation roundtrip for the others.

Stubs PR: https://github.com/microbit-foundation/micropython-microbit-stubs/pull/56

These stubs correspond to this beta MicroPython release: https://github.com/microbit-foundation/micropython-microbit-v2/releases/tag/v2.1.0-beta.1

Further more minor updates are expected for the 2.1.0 release.

[github-actions[bot]]

Preview build will be at https://review-python-editor-next.microbit.org/beta-stubs/

[microbit-matt-hillsdon]

(removed comment on wrong issue)

[microbit-robert]

There's a strange extra space here, but I can't see why in the stubs PR:

[microbit-matt-hillsdon]

There's a strange extra space here, but I can't see why in the stubs PR:

Raised https://github.com/microbit-foundation/python-editor-next/issues/938