[ethereum/go-ethereum] swarm/network: bump bzz protocol version (#17449)

This PR is needed because of https://github.com/ethersphere/go-ethereum/pull/816 — otherwise we would be getting errors after the handshake, due to nodes not being able to deserialise messages.
You can view, comment on, or merge this pull request online at:

https://github.com/ethereum/go-ethereum/pull/17449

— Commit Summary —

* swarm/network: bump bzz protocol version

— File Changes —

M swarm/network/protocol.go (2)
M swarm/network/protocol_test.go (2)

— Patch Links —

https://github.com/ethereum/go-ethereum/pull/17449.patch
https://github.com/ethereum/go-ethereum/pull/17449.diff