Update makefile with :soroban-dev -> :future #603

Job	Run time
amd64 / build-stellar-core	28s
amd64 / build-stellar-friendbot	1m 0s
amd64 / build-stellar-horizon	2m 26s
amd64 / build-stellar-soroban-rpc	2m 11s
amd64 / build-rs-stellar-xdr	1m 35s
arm64 / build-rs-stellar-xdr	3m 2s
arm64 / build-stellar-core	22s
arm64 / build-stellar-friendbot	4m 55s
arm64 / build-stellar-horizon	8m 47s
arm64 / build-stellar-soroban-rpc	3m 12s
amd64 / build	5m 27s
amd64 / test (testnet)	2m 8s
amd64 / push-pr	45s
amd64 / test (testnet, --enable-soroban-rpc)	2m 37s
amd64 / test (pubnet)	1m 28s
amd64 / test (local)	1m 33s
amd64 / test (local, --enable-soroban-rpc)	1m 49s
arm64 / build	7m 52s
amd64 / push-release	0s
arm64 / test (testnet)	4m 9s
arm64 / test (testnet, --enable-soroban-rpc)	5m 11s
arm64 / test (pubnet)	1m 15s
arm64 / push-pr	43s
arm64 / test (local)	2m 49s
arm64 / test (local, --enable-soroban-rpc)	3m 4s
arm64 / push-release	0s
manifest / push	4s
complete	1s
	1h 8m 53s

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