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

Job	Run time
amd64 / build-stellar-core	37s
amd64 / build-stellar-friendbot	55s
amd64 / build-stellar-horizon	2m 41s
amd64 / build-rs-stellar-xdr	2m 44s
amd64 / build-stellar-soroban-rpc	3m 1s
arm64 / build-stellar-horizon	8m 40s
arm64 / build-stellar-core	36s
arm64 / build-rs-stellar-xdr	1m 58s
arm64 / build-stellar-friendbot	4m 36s
arm64 / build-stellar-soroban-rpc	1m 59s
amd64 / build	4m 19s
amd64 / test (pubnet)	1m 46s
amd64 / push-pr	44s
amd64 / test (local)	1m 38s
amd64 / test (local, --enable-soroban-rpc)	1m 51s
arm64 / build	7m 32s
amd64 / push-release	0s
arm64 / test (pubnet)	1m 18s
arm64 / test (local)	2m 40s
arm64 / push-pr	56s
arm64 / test (local, --enable-soroban-rpc)	2m 57s
arm64 / push-release	0s
manifest / push	4s
complete	1s
	53m 33s

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