Bump the default erigon version for Gnosis Chiado erigon3 services from v3.5.3 to v3.6.0. v3.6.0 (2026-08-24) added 'Caplin accepts Chiado libp2p bootstrap nodes' (#23243/#23245), fixing the peer-discovery issue where Caplin cannot join Chiado CL gossip. v3.6.0 is drop-in for v3.5 datadirs (no resync).