chore(deps)(deps): bump @libp2p/mplex from 11.0.42 to 12.0.8

Bumps [@libp2p/mplex](https://github.com/libp2p/js-libp2p) from 11.0.42 to 12.0.8.
- [Release notes](https://github.com/libp2p/js-libp2p/releases)
- [Changelog](https://github.com/libp2p/js-libp2p/blob/main/.release-please.json)
- [Commits](libp2p/js-libp2p@mdns-v11.0.42...mdns-v12.0.8)

---
updated-dependencies:
- dependency-name: "@libp2p/mplex"
  dependency-version: 12.0.8
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

package-lock.json

@@ -63,7 +63,7 @@
     "@chainsafe/libp2p-noise": "16.1.3",
     "@libp2p/bootstrap": "11.0.42",
     "@libp2p/identify": "3.0.36",
-    "@libp2p/mplex": "11.0.42",
+    "@libp2p/mplex": "12.0.8",
     "@libp2p/ping": "2.0.35",
     "@libp2p/websockets": "9.2.16",
     "@noble/hashes": "^1.3.3",