Just posted this to #rp-rs:matrix.org but I see there's a lot more people here 😁

When using `panic_probe` with the `print-defmt` feature, am I meant to get a proper backtrace? I just get this currently from `probe-rs`:

```
ERROR panicked at src/main.rs:74:9:
OK
└─ panic_probe::print_defmt::print @ /home/jack/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/panic-probe-1.0.0/src/lib.rs:104
```

Which isn't all that useful in narrowing down the cause.

This is just `rp2040-project-template` (https://github.com/rp-rs/rp2040-project-template) with a panic I added to main to test it. If I move the panic to another function other than main and then call that, it doesn't show function names or anything.

I also tried using the print-rtt feature, but I just get nothing output when the device panics instead.