fix(deps): update esp-backtrace requirement in /tests/esp32c3

Updates the requirements on [esp-backtrace](https://github.com/esp-rs/esp-hal) to permit the latest version.
- [Release notes](https://github.com/esp-rs/esp-hal/releases)
- [Commits](https://github.com/esp-rs/esp-hal/commits)

---
updated-dependencies:
- dependency-name: esp-backtrace
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

tests/esp32c3/Cargo.toml

@@ -12,7 +12,7 @@ defmt-rtt = { version = "0.4.1"}
 
 # Esp32 related dependencies for main.rs. Note: embedded-test comes with its own panic handler and logging sink.
 esp-hal = { version = "0.23.1", features = ["esp32c3"] }
-esp-backtrace = { version = "0.14.0", features = [
+esp-backtrace = { version = "0.15.0", features = [
     "esp32c3",
     "exception-handler",
     "panic-handler",