## Summary of the Pull Request
The type of the `"id"` argument of the `focusPane` action under `"actions"` in the `settings.json` schema was incorrectly set to a string.
It's actually expecting a non-negative number, and defaults to 0.
So I fixed the schema.
## PR Checklist
* [x] Closes#11393
* [x] CLA signed
* [ ] Tests added/passed
* [ ] Documentation updated
* [x] Schema updated.
* [ ] I've discussed this with core contributors already. If not checked, I'm ready to accept this work might be rejected in favor of a different grand plan.
## Detailed Description of the Pull Request / Additional comments
## Validation Steps Performed
I've validated that a string makes Windows Terminal complain it's a string and not a number, and that a number works as expected, and that the default is indeed zero.
99b1190734