New license request: MuseScore GPL exception

[armijnhemel]

License Name

MuseScore GPL exception

License Homepage URL

https://musescore.org/en/about/gnu-general-public-license

Reference URLs

https://github.com/musescore/MuseScore/blob/master/LICENSE.txt

[DennisClark]

new license exception LicenseRef-scancode-musescore-exception-gpl-2.0 created in DejaCode enterprise and public. Copyleft Limited.

@AyanSinhaMahapatra please synchronize when you have time, thanks.

[AyanSinhaMahapatra]

Added in #4478, added also to licensedb and license-expression v30.4.4 , closing.