Can't choose new template

[fyangstudio]

We can build a rax project at this address, but the default setting in sandbox.config.json, rax, will fail. The default setting, node, can only be changed to rax manually
https://pr3346.build.csb.dev/s/github/raxjs/rax-codesandbox-template/tree/master/

How can I set the rax template type by default?

Code 422: https://pr3346.build.csb.dev/s/github/raxjs/rax-codesandbox-template/tree/feat-rax-template/

PR：#3346