docs(iroh-cli): fix typo (#2718)

## Description

Fixes a typo introduced in a previous PR.

## Breaking Changes

<!-- Optional, if there are any breaking changes document them,
including how to migrate older code. -->

## Notes & open questions

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## Change checklist

- [ ] Self-review.
- [X] Documentation updates following the [style
guide](https://rust-lang.github.io/rfcs/1574-more-api-documentation-conventions.html#appendix-a-full-conventions-text),
if relevant.
- [ ] Tests if relevant.
- [ ] All breaking changes documented.

iroh-cli/src/commands/docs.rs

@@ -743,7 +743,7 @@ async fn fmt_entry(doc: &Doc, entry: &Entry, mode: DisplayContentMode) -> String
     format!("@{author}: {key} = {content} ({len})")
 }
 
-/// Converts a path to a cannonical path.
+/// Converts a path to a canonical path.
 fn canonicalize_path(path: &str) -> anyhow::Result<PathBuf> {
     let path = PathBuf::from(shellexpand::tilde(&path).to_string());
     Ok(path)