Can't seem to get defmt to print out anything over RTT... I must be misconfiguring something . When using `target-rtt` crate I get normal output over RTT, is there anything I'm missing?
I have these defines:
```
use defmt_rtt as _;
use panic_probe as _;
```
The line of code to link defmt `-Tdefmt.x`. In Cargo I have
```
defmt = "0.3.2"
defmt-rtt = "0.4.0"
```

My code panics and there's just a `~` printed nothing else..