deps: bump @libp2p/keychain from 4.1.6 to 5.0.0

Bumps [@libp2p/keychain](https://github.com/libp2p/js-libp2p) from 4.1.6 to 5.0.0.
- [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@crypto-v4.1.6...utils-v5.0.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

packages/helia/package.json

@@ -68,7 +68,7 @@
     "@libp2p/identify": "^2.0.0",
     "@libp2p/interface": "^1.1.4",
     "@libp2p/kad-dht": "^12.0.8",
-    "@libp2p/keychain": "^4.0.9",
+    "@libp2p/keychain": "^5.0.0",
     "@libp2p/logger": "^4.0.7",
     "@libp2p/mdns": "^10.0.16",
     "@libp2p/mplex": "^10.0.16",

packages/interop/package.json

@@ -74,7 +74,7 @@
     "@ipld/dag-cbor": "^9.2.0",
     "@libp2p/interface": "^1.1.4",
     "@libp2p/kad-dht": "^12.0.8",
-    "@libp2p/keychain": "^4.0.9",
+    "@libp2p/keychain": "^5.0.0",
     "@libp2p/peer-id": "^4.0.7",
     "@libp2p/peer-id-factory": "^4.0.7",
     "@libp2p/websockets": "^8.0.16",