deps(bytes): bytes v1.6.0 was yanked so upgrade to bytes v1.6.1 (#2503)

## Description

<!-- A summary of what this pull request achieves and a rough list of
changes. -->
GitHub Actions `cargo deny` is failing at
https://github.com/n0-computer/iroh/actions/runs/9928231752/job/27438879671

% `cargo update -p bytes`
```
    Updating crates.io index
     Locking 1 package to latest compatible version
    Updating bytes v1.6.0 -> v1.6.1
note: pass `--verbose` to see 152 unchanged dependencies behind latest
```
https://github.com/tokio-rs/bytes/blob/master/CHANGELOG.md to get the
fix in
* tokio-rs/bytes#718
## 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.
- [ ] 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.

Author: cclauss