Temporarily set CODAL_VERSION back to "unknown".

[microbit-carlos]

This is to workaround an issue in the iOS app as described in:

• Beta: iOS micro:bit app refuses to pair with hex from Beta microsoft/pxt-microbit#5913

Versions with this patch:

CODAL_VERSION_MAJOR: 0
CODAL_VERSION_MINOR: 2
CODAL_VERSION_PATCH: 67
CODAL_VERSION_HASH: a8470a7
CODAL_TARGET_NAME: codal-microbit-v2
CODAL_VERSION: unknown
CODAL_VERSION_LONG: unknown+codal-microbit-v2-a8470a7
DEVICE_DAL_VERSION: unknown
MICROBIT_DAL_VERSION: unknown
microbit_dal_version(): unknown
uBit.getVersion(): unknown

[github-actions]

Build diff

Base commit: a8470a76d9f3420f1daa1ecaf3eda80732bb857c
Action run: https://github.com/lancaster-university/codal-microbit-v2/actions/runs/10727618041

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