Change Era from BabbageEra to ConwayEra #4231

Job	Run time
Build & test (plutus-cbor)	1m 56s
Build haddock using nix	5m 6s
Build & test (plutus-merkle-tree)	1m 31s
Benchmarks (hydra-node, tx-cost, --output-directory $(pwd)/../benchmarks)	4m 30s
Build & test (hydra-plutus)	3m 39s
Benchmarks (hydra-node, micro, -o $(pwd)/../benchmarks/ledger-bench.html)	4m 40s
Build specification using nix	1m 16s
Benchmarks (hydra-cluster, bench-e2e, datasets datasets/1-node.json datasets/3-nodes.json --outpu...	4m 48s
Build & test (hydra-tui)	4m 21s
Benchmarks (plutus-merkle-tree, on-chain-cost, $(pwd)/../benchmarks)	2m 25s
Build & test (hydra-node)	4m 41s
nix flake check	8m 53s
Build & test (hydra-cluster)	5m 0s
Publish benchmark results	0s
Publish test results	0s
Documentation	0s
	52m 46s

Provide feedback