deps: bump the libp2p group in /rust-peer with 2 updates

Bumps the libp2p group in /rust-peer with 2 updates: [libp2p](https://github.com/libp2p/rust-libp2p) and [libp2p-webrtc](https://github.com/libp2p/rust-libp2p).


Updates `libp2p` from 0.55.0 to 0.56.0
- [Release notes](https://github.com/libp2p/rust-libp2p/releases)
- [Changelog](https://github.com/libp2p/rust-libp2p/blob/master/CHANGELOG.md)
- [Commits](libp2p/rust-libp2p@libp2p-v0.55.0...libp2p-v0.56.0)

Updates `libp2p-webrtc` from 0.9.0-alpha to 0.9.0-alpha.1
- [Release notes](https://github.com/libp2p/rust-libp2p/releases)
- [Changelog](https://github.com/libp2p/rust-libp2p/blob/master/CHANGELOG.md)
- [Commits](libp2p/rust-libp2p@libp2p-webrtc-v0.9.0-alpha...libp2p-webrtc-v0.9.0-alpha.1)

---
updated-dependencies:
- dependency-name: libp2p
  dependency-version: 0.56.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: libp2p
- dependency-name: libp2p-webrtc
  dependency-version: 0.9.0-alpha.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: libp2p
...

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

Author: dependabot[bot]