084b720a90
This allows users to specify platform in a more humane way, for example:
```yaml
env:
# equals to `linux/amd64, linux/arm/v6`
platforms: >
linux/amd64,
linux/arm/v6
- uses: docker/setup-qemu-action@v2
with:
platforms: ${{ env.PLATFORMS }}
```
Signed-off-by: Chocobo1 <Chocobo1@users.noreply.github.com>