docs: fix typo in panic_hook example (#2453)

examples/examples/panic_hook.rs

@@ -30,7 +30,7 @@ fn main() {
  // On nightly Rust, where the `PanicInfo` type also exposes a
  // `message()` method returning just the message, we could record
  // just the message instead of the entire `fmt::Display`
- // implementation, avoiding the duplciated location
+ // implementation, avoiding the duplicated location
  tracing::error!(
  message = %panic,
  panic.file = location.file(),