title: "xcm: minor fix for compatibility with V4"

doc:
  - audience: ["Runtime Dev", "Runtime User"]
    description: |
      Following the removal of `Rococo`, `Westend` and `Wococo` from `NetworkId`, fixed `xcm::v5::NetworkId` encoding/decoding to be compatible with `xcm::v4::NetworkId`

crates:
- name: staging-xcm
  bump: patch