[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.
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— 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 —