Bump scratch-vm from 796566f to 70f4c5b

Bumps [scratch-vm](https://github.com/02engine/scratch-vm) from `796566f` to `70f4c5b`.
- [Commits](02engine/scratch-vm@796566f...70f4c5b)

---
updated-dependencies:
- dependency-name: scratch-vm
  dependency-version: 70f4c5b9a4c8774020bfb830e31e851e8f8b7636
  dependency-type: direct:production
...

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Author: dependabot[bot]