Allow for manual run of explorer workflow #5480

Job	Run time
Build & test (plutus-cbor)	1m 2s
Build haddock using nix	59s
Build & test (plutus-merkle-tree)	1m 0s
Build & test (hydra-plutus)	1m 5s
Build & test (hydra-tui)	2m 52s
Benchmarks (hydra-node, tx-cost, --output-directory $(pwd)/../benchmarks)	2m 26s
Build & test (hydra-node)	5m 10s
Benchmarks (hydra-node, micro, -o $(pwd)/../benchmarks/ledger-bench.html)	1m 29s
Build & test (hydra-tx)	1m 34s
Benchmarks (hydra-cluster, bench-e2e, datasets datasets/1-node.json datasets/3-nodes.json --outpu...	4m 55s
Build & test (hydra-cluster)	7m 42s
Benchmarks (plutus-merkle-tree, on-chain-cost, $(pwd)/../benchmarks)	1m 12s
Build specification using nix	1m 31s
nix flake check	3m 40s
Publish benchmark results	3s
Documentation	2m 41s
Publish test results	14s
	39m 35s

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