build(deps-dev): bump scratch-vm from 7ef5e29 to b8520cc

Bumps [scratch-vm](https://github.com/TurboWarp/scratch-vm) from `7ef5e29` to `b8520cc`.
- [Commits](TurboWarp/scratch-vm@7ef5e29...b8520cc)

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updated-dependencies:
- dependency-name: scratch-vm
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]